A dead key fob is one of the most annoying small problems a car can have, and the fix is usually a single coin cell. Here is the short version: most smart keys and keyless-entry fobs take a CR2032, the swap takes about five minutes with a small screwdriver or a plastic pry tool, and a name-brand cell in a daily-driven car should comfortably outlast a year of normal use. The rest of this guide is the detail that decides whether your fob works three months from now or three years from now, including which cell code your specific vehicle takes.
Almost every battery we see in this category is a 3-volt lithium manganese dioxide coin cell. The codes look cryptic because the last two digits are the diameter in millimetres, and the two middle digits are the thickness in tenths of a millimetre. CR2032 means 20mm across and 3.2mm thick. CR2025 is the same 20mm width at 2.5mm. CR2450 is 24.5mm across and 5.0mm thick, which is why it will not drop into a fob built for a CR2032 no matter how hard you push it.
That size gap is the single most common reason a new battery appears to fail. A CR2025 dropped into a CR2032 slot sits on the contacts but is not clamped by them, and the resulting poor connection drains the cell quickly. We have also seen plenty of fobs die from corrosion on the battery contact or the retaining tab, which looks identical to a dead cell from the driver’s seat. Our deep cycle battery guide covers the same chemistry principles at a much larger scale if you want the background.
How we picked: we read the rating and review volume on every listing, cross-checked the stated cell code against the fitment claims, and favoured products that name the vehicle makes they fit instead of claiming to be universal. We also weighted child-resistant packaging, since a 20mm coin cell is a genuine ingestion hazard in a house with small children. Nothing on this page is based on a single test car. Where we describe durability, we are describing what the manufacturer claims and what buyers report, and we tell you which is which.
Table of Contents
- Top 3 Key Fob Replacement Batteries (October 2026)
- All 15 Key Fob Batteries at a Glance in 2026
- What Battery Does Your Car Key Take?
- 1. Energizer 2032 Batteries 4 Pack – Best Overall for Most Vehicles
- 2. Duracell 2032 Lithium Battery 4 Count – Highest Stated Capacity
- 3. Amazon Basics CR2032 10-Pack – Best Value for Multiple Fobs
- 4. Duracell CR2450 Lithium Battery 1 Count – The Wide Cell for Ford Fobs
- 5. Panasonic CR2025 4 Pack – Best for Standards-Based Child Safety
- 6. Panasonic CR1616 2 Pack – Best for Smaller Legacy Keys
- 7. Nissan Smart Fob Batteries 2 Pack – Fitment Already Checked
- 8. Chevy and GMC Fob Batteries 2 Pack – Best for GM Intelligent Access
- 9. Ford and Lincoln Fob Batteries 2 Pack – The CR2450 Ford Owners Need
- 10. Toyota CR2032 Key Fob Batteries 2 Pack – Best for Toyota Owners
- 11. Jeep Dodge Chrysler CR2032 Batteries 2 Pack – Best for First-Time Installers
- 12. CR2450 Car Key Battery 2 Pack – Best for Multi-Size Households
- 13. Tesla Model X Fob Battery 2 Pack – The Rare CR2354
- 14. Toyota Heads Key CR2016 Batteries 2 Pack – Best for Legacy Toyota Keys
- 15. Cadillac CR2032 Key Fob Batteries 2 Pack – Best for Cadillac Owners
- How to Choose a Key Fob Battery in 2026?
- Confirm the code before you buy anything
- CR2032 versus CR2025 versus CR2450: what actually changes?
- Name-brand against generic cells, and the Panasonic question
- Child safety is a real selection criterion
- Pack size, shelf life and the two-key household
- Do aftermarket batteries cause programming or warranty problems?
- Cold climates and hot climates
- What drains a key fob battery fastest?
- Where to buy, and the dealer comparison?
- New Battery, Fob Still Dead: The Order We Use
- How to Change a Key Fob Battery Without a Dealer?
- Frequently Asked Questions
- The Best Key Fob Replacement Batteries by Vehicle in 2026
Top 3 Key Fob Replacement Batteries (October 2026)
Energizer 2032 Batteries 4 Pack
- 3V lithium coin cells
- 3-in-1 Child Shield with Color Alert
- operates from -22 to 140 F
- four cells per pack
Duracell 2032 Lithium 4 Count
- 1500mAh lithium manganese dioxide
- 10-year storage guarantee
- bitter coating both sides
- listed for Toyota Honda BMW Ford Chevy fobs
Amazon Basics CR2032 10-Pack
- 225mAh per cell
- non-coated for clean contact
- replaces BR2032 DL2032 ECR2032
- ten cells per pack
The Energizer four-pack takes the top slot on the strength of its review volume and its published temperature range, which runs from -22 to 140 degrees Fahrenheit. That cold-weather floor matters more in northern climates than most buyers expect. The Duracell four-count matches it on rating, publishes a higher 1500mAh capacity figure and a 10-year storage guarantee, and is the pick if you prefer the highest stated capacity per cell. The Amazon Basics ten-pack is the value choice for households with two fobs or more.
All 15 Key Fob Batteries at a Glance in 2026
| Product | Key Specs | Pricing |
|---|---|---|
| Energizer 2032 Batteries 4 Pack |
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Check Latest Price |
| Duracell 2032 Lithium 4 Count |
|
Check Latest Price |
| Amazon Basics CR2032 10-Pack |
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Check Latest Price |
 Duracell CR2450 1 Count |
|
Check Latest Price |
 Panasonic CR2025 4 Pack |
|
Check Latest Price |
 Panasonic CR1616 2 Pack |
|
Check Latest Price |
 Nissan Smart Fob Batteries 2 Pack |
|
Check Latest Price |
 Chevy and GMC Fob Batteries 2 Pack |
|
Check Latest Price |
 Ford and Lincoln Fob Batteries 2 Pack |
|
Check Latest Price |
 Toyota CR2032 Fob Batteries 2 Pack |
|
Check Latest Price |
 Jeep Dodge Chrysler CR2032 2 Pack |
|
Check Latest Price |
 CR2450 Car Key Battery 2 Pack |
|
Check Latest Price |
 Tesla Model X Fob Batteries 2 Pack |
|
Check Latest Price |
 Toyota Heads Key CR2016 2 Pack |
|
Check Latest Price |
 Cadillac CR2032 Fob Batteries 2 Pack |
|
Check Latest Price |
Seven of these are general-purpose coin cells that fit any fob built for that code. The other eight are vehicle-specific kits, which are worth the swap if you want the fitment already checked for you and a pry tool in the box.
What Battery Does Your Car Key Take?
The honest answer is that the fob tells you, not the model year. Nearly every fob has the cell code stamped on the plastic next to the battery, or printed on a label on the back shell. Open it, look, and the guessing stops. The map below covers the makes that come up most often in our searches, and it is the section we would read first if we owned a new vehicle.
Toyota and Lexus
Toyota smart keys and fobs use a CR2032 across most of the range, covering Camry, Corolla, RAV4, Highlander, Tacoma, Tundra, 4Runner, Avalon, Sienna, Prius, CHR, Sequoia, Supra and GR86. Older traditional heads keys with no remote start use a smaller CR2016 instead, and that is the exception worth knowing about.
Honda and Acura
Honda is the make where people most often guess wrong. Smart keys on Accord, CR-V, Civic, Pilot, HR-V, Odyssey and Ridgeline take a CR2032, and so do the newer digital key systems. Older remote head keys from the 2000s and early 2010s can use a CR1620. The two look similar in the hand and both are 16mm across, so read the stamp rather than the shape.
Nissan and Infiniti
Nissan smart fobs on Rogue, Altima, Sentra, Versa, Pathfinder, Murano, Maxima, Kicks, Titan, Frontier, Armada, Leaf, Juke, Quest, 370Z, GT-R and 400Z take a CR2032. The confusion comes from Nissan fobs where the key blade sticks out of the shell, which are a different generation with a different cell. The Nissan-specific kit in this roundup covers the smart fobs and explicitly excludes the protruding-blade style.
Ford and Lincoln
Recent Ford and Lincoln intelligent access remotes, covering roughly the 2017 to 2025 generation, use a CR2450. That is the wide, thick cell, and it is the reason so many Ford owners are caught with a battery that will not physically fit the fob they bought for a friend. Ford flip keys and older standard keys are a different fitment entirely and are not covered by the Ford-specific kit here.
Chevrolet, GMC and Cadillac
Cruze, Malibu, Equinox, Traverse, Acadia, Colorado, Terrain, Camaro, Tahoe, Suburban, Sierra and the Silverado range through 2021 use a CR2032. Cadillac Escalade, XT5, CTS, SRX, XT4, XTS, XT6, ATS, DTS, CT6 and STS also use a CR2032, with Escalade coverage listed from 1999 to 2020. The newer PEPS trucks and SUVs from 2021 onward, along with the EV variants, moved to a different fob and are excluded from the kits listed here.
Jeep, Dodge, Ram and Chrysler
FOBIKS remotes on Cherokee, Compass, Grand Cherokee and Wrangler, plus Dodge and Chrysler remotes on Charger, Challenger, Durango and Pacifica, use a CR2032. Wrangler and Gladiator fobs from the 2018 to 2024 generation are the ones we would double-check, because fitment varies across trim and market.
Tesla
Only one Tesla key in this roundup is covered: the Model X and Model X Plaid key, which uses a CR2354. That is a less common code and harder to find in a drugstore than a CR2032. The Model S, Model 3 and Model Y use a different card-style key, so check before you buy anything.
The code glossary
CR2032 is 20mm by 3.2mm and is the default for smart keys. CR2025 is 20mm by 2.5mm and carries roughly 35 to 40 percent less capacity, so it is a substitute only in a loose-contact emergency, never a permanent fix. CR2450 is 24.5mm by 5.0mm and fits Ford, Lincoln and some Volkswagen and Audi keys. CR2016 is 20mm by 1.6mm and appears in older Toyota heads keys. CR1616 is 16mm by 1.6mm and shows up in some small electronics and legacy remotes. CR1620 is 16mm by 2.0mm and is common in older Honda and Nissan head keys. CR2354 is 23mm by 5.4mm and is the Tesla Model X cell.
1. Energizer 2032 Batteries 4 Pack – Best Overall for Most Vehicles
Energizer 2032 Batteries (4 Pack), 3V Lithium Coin Batteries
★★★★★★★★★★4 pack CR2032 3V lithium
Operates -22 to 140 F
Child shield with Color Alert
0.64 ounces
- Largest review base in the roundup at 285k
- -22 F lower limit is the best cold-weather figure here
- Color Alert dye shows if a child has mouthed a cell
- four cells cover two fobs and a spare
- Child-resistant packaging needs scissors
- bitter coating can cause poor contact if the cell is not firmly seated
- CR2032 only
This is the pack we hand to anyone who asks for one answer. The Energizer CR2032 four-pack sits at 4.8 stars across more than 285k reviews, and that volume is the reason we trust the rating rather than just reading it. Buyers consistently describe dependable 3V output in keyless entry systems, garage remotes and trackers, and the pack format means one swap covers both keys in a two-key household.
The specs that matter for car use are the -22 to 140 degree Fahrenheit operating range, the coldest rating published anywhere in this roundup, and the 3-in-1 Child Shield: a bitter coating that makes the cell unpleasant if swallowed, Color Alert dye that shows in a child’s mouth, and packaging a child cannot open alone. A 20mm lithium cell is a genuine ingestion hazard, so for a household with toddlers that combination is worth more than a small capacity difference.
Who this pack suits?
It suits almost every driver whose fob takes a CR2032, which is the majority of smart keys on the road. It also suits cold-climate owners, because the published lower operating limit is the best in this group, and two-key households, because four cells cover both fobs plus a spare for the glovebox. Those are the criteria that decide the top three, and the fifteen options below cover every code and vehicle generation we could source.
Who should skip it?
Skip it if your fob takes anything other than a CR2032, and skip it if you are working inside a key case where a bitter-coated cell might not seat cleanly against the contacts. If your fob is a Ford intelligent access or a Tesla Model X, this cell is physically the wrong shape.
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2. Duracell 2032 Lithium Battery 4 Count – Highest Stated Capacity
Duracell 2032 Lithium Battery, 4 Count, AirTag & Key Fob, CR2032 3V Cell
★★★★★★★★★★CR2032 3V lithium manganese dioxide
1500mAh capacity
10-year storage guarantee
Bitter coating both sides
- Listing explicitly names Toyota Honda BMW Ford Chevrolet fobs and AirTags
- highest stated capacity figure here at 1500mAh
- 10-year storage guarantee means spares keep
- bitter coating on both faces
- Packaging must be cut open with scissors
- bitter coating can reduce contact if the cell is not pressed firmly home
The Duracell four-count matches the Energizer on rating at 4.8 stars across more than 101k reviews and edges it on published specifications. Duracell states 1500 milliamp hours of capacity for these cells, lithium manganese dioxide chemistry, and a 10-year storage guarantee. It also names the vehicle makes it is intended for, listing Toyota, Honda, BMW, Ford and Chevrolet fobs alongside AirTags, which is more useful copy than a generic device list.
Buyers report consistent 3V output and long service life in fobs and trackers, with an 86 percent five-star share across the review base. The 10-year storage guarantee is the quiet winner here, because a spare cell in a console drawer stays usable for years, and that is what makes a four-pack sensible rather than wasteful. One recurring complaint applies to this cell and the Energizer alike: the bitter coating sits on both faces, so a cell that is not pressed firmly home can read as intermittent. Seat it flat and the problem disappears.
Who this pack suits?
It suits drivers who want the highest published capacity per cell, owners who keep a spare on hand for years, and anyone with AirTags alongside a car key. It is also a good pick for a household with several CR2032 devices, since watches, glucose monitors and tire pressure sensors use the same code.
Who should skip it?
Skip it for a Ford intelligent access key or any CR2450 fob. Owners who fumble small cells should note the packaging needs scissors, and anyone installing into a very tight fob should press the cell home properly to avoid the coating contact complaint.
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3. Amazon Basics CR2032 10-Pack – Best Value for Multiple Fobs
Amazon Basics CR2032 3V Lithium Coin Cell Batteries for Key Fob, Watch, Remote, Child-Proof Package, Non-Coated, AirTag Compatible, 10-Pack
★★★★★★★★★★10 pack CR2032 3V lithium
225mAh per cell
Non-coated cells
Replaces BR2032 DL2032 ECR2032
- Ten cells in one pack covers every fob in the house in a single purchase
- non-coated design gives clean contact in fobs and trackers
- replaces BR2032 DL2032 and ECR2032 equivalents
- model number engraved on the cell
- Child-resistant packaging requires tools to open
- 225mAh is a lower stated capacity than the premium name-brand cells
Ten cells is the argument. If you drive two cars, carry two keys per car, or want a genuine spare in the glovebox, this pack resolves the whole category in one purchase. It holds 4.7 stars across more than 189k reviews with an 83 percent five-star share, which puts it in the same reliability territory as the name-brand cells while covering more fobs per purchase.
The absence of a bitter coating is the design decision we like most here, because bare metal gives clean contact in a fob you cannot easily inspect. Stated capacity is 225 milliamp hours, the model is engraved on the cell for identification in a drawer full of batteries, and the pack cross-replaces BR2032, DL2032 and ECR2032. The trade-off is real: 225mAh sits below the 1500mAh figure the Duracell listing carries, so this is a value pick rather than a maximum-endurance one.
Who this pack suits?
It suits multi-vehicle households, drivers who want to stop thinking about this for two or three years, and anyone whose fob has tight contacts. It is also the pack we would keep in the house rather than the car, given the shelf life of a lithium coin cell.
Who should skip it?
Skip it if you need the highest stated capacity and drive a car in extreme cold, and skip it in a house with small children who might find loose coin cells, since the packaging is child-resistant but the cells themselves are not coated.
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4. Duracell CR2450 Lithium Battery 1 Count – The Wide Cell for Ford Fobs
Duracell CR2450 Lithium Battery, 1 Count, Key Fob & Watch & Car Remote
★★★★★★★★★★CR2450 3V lithium single cell
Replaces DL2450 equivalents
Child-resistant packaging
10-year storage guarantee
- Correct code for Ford and Lincoln intelligent access remotes
- immediate and consistent power once seated
- 10-year storage guarantee makes a single-cell purchase practical as a spare
- Single-count pack means buying twice for a fob that needs two cells
- a small minority of buyers report shorter than expected service life
If your Ford or Lincoln key takes a CR2450, this single cell is the correct answer and the pack size is a non-issue. The CR2450 is 24.5mm across and 5.0mm thick, roughly 40 percent wider than a CR2032, and it simply will not enter a fob built for the smaller cell. Getting the code right here matters more than brand choice.
Buyers describe the swap as restoring power immediately, and the 10-year storage guarantee means keeping one loose costs nothing but a little space. The listing also serves watches, medical devices and security sensors, so a single cell is not wasted if your fob turns out to take something else. The 4.7 rating across more than 31k reviews carries an 85 percent five-star share. The complaint is quantity rather than quality, and a small minority of buyers report shorter than expected service life.
Who this cell suits?
It suits 2017 and newer Ford and Lincoln intelligent access remotes, and any other fob stamped CR2450. It also suits owners who want one emergency spare cell in the glovebox rather than a bulk pack.
Who should skip it?
Skip it for a Toyota, Honda, Nissan, Chevrolet or Jeep fob, all of which are CR2032 territory. Buyers who prefer a paired pack for two fobs should look at the two-cell CR2450 listing further down instead.
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5. Panasonic CR2025 4 Pack – Best for Standards-Based Child Safety
Panasonic CR2025 3.0 Volt Long Lasting Lithium Coin Cell Batteries in Child Resistant, Standards Based Packaging, 4 Pack
★★★★★★★★★★CR2025 3V lithium, 4 pack
IEC 60086-4 child-resistant pack
Up to 8-year storage life
Reliable 14 to 140 F
- Packaging is tested to IEC 60086-4:2019 and ANSI C18.3M standards
- up to 8 years of storage life for keeping spares
- reliable from 14 to 140 F
- explicitly listed for car key fobs among hundreds of device types
- Four-pack sizing wastes cells if your fob takes one
- CR2025 is a less common fob code than CR2032 so fitment needs checking
The Panasonic CR2025 four-pack is the pick when your fob is stamped CR2025 and your household includes small children. Its child-resistant packaging is tested to IEC 60086-4:2019 and ANSI C18.3M Part 2:2024, which are the standards written after Reese’s Law rather than marketing language about child safety. If you have ever had a coin cell anywhere near a toddler, that distinction is worth paying attention to.
Technically it is a 2.5g lithium manganese dioxide cell rated at 3 volts, with up to 8 years of storage life and reliable operation from 14 to 140 degrees Fahrenheit. That 14 degree floor is well above the Energizer pack, so this is not the one for a car parked outside in deep winter. Reviews sit at 4.7 stars across more than 7k with an 83 percent five-star share, and buyers highlight the packaging standards alongside usefulness across key fobs, watches, glucometers and garage openers.
Who this pack suits?
It suits owners of a CR2025 fob, which includes a number of Mazda, Mercedes-Benz, Volkswagen and Audi keys, and it suits households prioritising documented child-resistant packaging. The 8-year storage figure also makes a four-pack sensible for keeping spares.
Who should skip it?
Skip it if your fob is CR2032, the far more common code, and skip it in very cold climates given the 14 degree lower limit. A single-fob owner with no other devices will also end up with three unused cells.
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6. Panasonic CR1616 2 Pack – Best for Smaller Legacy Keys
Panasonic CR1616 3.0 Volt Long Lasting Lithium Coin Cell Batteries in Child Resistant, Standards Based Packaging, 2-Battery Pack
★★★★★★★★★★CR1616 3V lithium, 2 pack
1g per cell
Child-resistant standards-based pack
Up to 8 years storage life
- Same IEC and ANSI tested packaging as the CR2025 pack
- up to 8 years of storage life supports keeping a spare
- works across car key fobs watches garage openers and small electronics
- Two-pack covers few fobs that take a single cell
- CR1616 is a less common key fob size and needs careful fitment checking
The CR1616 is one of those codes that people only find after they have opened the fob and read the stamp, which is exactly why it is worth knowing it exists. At 16mm across and 1.6mm thick it is a small, thin cell, and it appears in older remotes and in a range of small electronics rather than in the current generation of smart keys.
It is a 1 gram lithium manganese dioxide cell at 3 volts with the same IEC 60086-4:2019 and ANSI C18.3M Part 2:2024 packaging as the CR2025 above, the same up-to-8-year storage life, and the same 14 to 140 F reliability range. Reviews are 4.7 stars across more than 1.2k with an 87 percent five-star share, with buyers reporting consistent power in car key fobs and small devices. Because the code is uncommon, read the fob stamp before ordering.
Who this pack suits?
It suits owners of an older remote stamped CR1616, and it suits anyone who wants documented child-resistant packaging at a lighter cell weight. The 8-year storage life makes the spare a genuinely long-term one.
Who should skip it?
Skip it for a modern smart key, which is almost certainly a CR2032. If you have not opened the fob and confirmed the code, buy the more common cell first, because guessing is how people end up with a drawer of the wrong battery.
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7. Nissan Smart Fob Batteries 2 Pack – Fitment Already Checked
Key Fob Replacement Batteries for Nissan, Pack of 2
★★★★★★★★★★Two CR2032 3V cells for Nissan smart fobs
Covers Rogue Altima Sentra Leaf and more
No programming required
Installation guide included
- Covers a long list of Nissan and Infiniti smart fob models
- two CR2032 cells cover two fobs or one fob and a spare
- removes the dealer service charge for a two-minute swap
- Does not fit Nissan fobs where the key blade sticks out
- you need to check the fitment guide images to confirm compatibility
This is the Nissan smart fob kit, two CR2032 3V cells and nothing else to think about. The listed coverage is long: Rogue, Altima, Sentra, Versa, Pathfinder, Murano, Maxima, Kicks, Titan, Frontier, Armada, Leaf, Juke, Quest, 370Z, GT-R, 400Z, Ariya and Z. For an owner who has already identified their fob as the smart style, the fitment question is closed.
Reviews sit at 4.7 stars across more than 1.3k, an 84 percent five-star share, with owners saying the cells fit their Nissan smart fobs and restore remote function and that the fitment guide helped them confirm the right fob. The kit includes an installation guide and requires no programming, which is true of every coin cell swap but is good to see stated plainly.
The exclusion matters more than the list. This kit does not fit Nissan fobs where the key blade sticks out of the shell, which is a different generation with a different internal layout. That single carve-out is the reason we would not recommend a two-cell Nissan kit to a household that owns both styles. Check the shape of your key before ordering, or buy the general CR2032 pack and read the stamp.
Who this kit suits?
It suits Nissan and Infiniti owners with a smart fob who want the model list pre-checked and a spare in the same box. It is a good fit for Leaf owners too, since a two-pack matches two keys.
Who should skip it?
Skip it if your key blade protrudes from the fob, and skip it if you are not certain which Nissan fob generation you own. A mixed-brand household is better served by the general four or ten-pack of CR2032 cells.
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8. Chevy and GMC Fob Batteries 2 Pack – Best for GM Intelligent Access
Key Fob Replacement Batteries for Chevy & GMC, Pack of 2, Check Fit Guide
★★★★★★★★★★Two CR2032 3V cells, 225mAh
Chevy and GMC smart fobs
Fitment guide in images
No programming required
- Broad model and year coverage across Chevy and GMC lineups
- owners report it functioning like the OEM cell and outlasting one shop purchase
- two cells cover two fobs or a spare
- easy swap avoids the dealer service fee
- Excludes several 2021-2026 models and EV variants so fitment must be checked
- fitment depends on matching your fob to the guide images
The GM kit is the one we would point a Silverado or Equinox owner toward. Two CR2032 3V cells rated at 225 milliamp hours, listed for Silverado from 1999 to 2021, Equinox from 2005 to 2023, Malibu, Traverse, Cruze, Sierra, Acadia, Colorado, Terrain, Camaro, Tahoe and more. The fitment guide lives in the product images, so you match your fob shape before ordering.
Ratings are 4.8 stars across more than 860 reviews, the highest average in this roundup alongside the two name-brand CR2032 packs, with an 88 percent five-star share. Buyers describe perfect fit in their Chevy and GMC fobs, some reporting about a year of service from one set and immediate function after installation. A few also report it outperforming a cell they had bought from a locksmith shop, which matches the wider pattern we see about dealer and shop-supplied cells.
The exclusions are the 2021 to 2026 Tahoe, Yukon, Equinox, Silverado and Sierra variants, along with EV models. Those newer PEPS trucks and large SUVs moved to a different fob, and putting a CR2032 in the wrong one either does not fit or gives you a warning light that never clears. If your truck is a 2022 Silverado, stop and check the code rather than trusting the brand name.
Who this kit suits?
It suits Chevrolet and GMC owners whose fob falls inside the listed year range, particularly two-key households. It also suits anyone who prefers a vehicle-specific kit over a generic pack because the fitment is already done.
Who should skip it?
Skip it for 2021 and newer PEPS trucks and SUVs, and for EV variants. Cadillac owners have their own dedicated kit further down this page, and a mixed Chevrolet and Cadillac household may be better off with a general CR2032 pack.
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9. Ford and Lincoln Fob Batteries 2 Pack – The CR2450 Ford Owners Need
Key Fob Replacement Batteries for Ford & Lincoln, 2 Pack, Check Fit Guide
★★★★★★★★★★Two CR2450 3V cells, 225mAh
2017-2025 Ford and Lincoln remotes
Intelligent access only
Fitment guide in images
- Purpose-built CR2450 cells for 2017-2025 Ford and Lincoln intelligent access remotes
- two-cell pack covers two fobs or a spare
- removes the dealer battery service fee
- Does not fit Ford flip keys or standard key blades
- fitment guide images must be checked before purchase
Ford is the reason many people land on this page. The 2017 to 2025 generation of intelligent access remotes takes a CR2450, a wider and much thicker cell than the CR2032 used almost everywhere else, and this two-pack is built for exactly those fobs. If you have been trying to fit a CR2032 into a Ford remote and it will not go in, this is the reason, not your technique.
Two CR2450 3V cells rated at 225 milliamp hours, with a fitment guide in the images and no programming required for the swap. Reviews run 4.6 stars across more than 500, an 84 percent five-star share. The feedback concentrates on correct fitment for the newer Ford smart remotes and the savings compared with a dealer battery service, which is a sensible double reason to buy.
The limitation is the other half of the Ford range. This kit does not fit Ford flip keys or standard keys, so an owner of an older F-150 or a Focus with a flip key needs to read the code inside the fob first. At 4.6 stars this is the lowest-rated item among the Ford and GM kits in the roundup, though the sample size is small enough that we would not over-read the gap.
Who this kit suits?
It suits Ford and Lincoln owners with a 2017 to 2025 intelligent access remote, especially F-150, Explorer, Escape and Expedition owners who have two keys. The paired format gives a spare without a second purchase.
Who should skip it?
Skip it for Ford flip keys and standard key blades, which use a different cell. If you own a Ford and a Toyota, a general multi-size approach suits you better than a single-brand kit.
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10. Toyota CR2032 Key Fob Batteries 2 Pack – Best for Toyota Owners
Key Fob Battery Replacement for Toyota CR2032, Pack of 2
★★★★★★★★★★Two CR2032 3V lithium cells
Toyota-specific fit
90-day warranty
Installation instructions included
- Correct CR2032 fit for Toyota fobs including a 2020 Tacoma and a 2022 4Runner
- owners report the cells are Panasonic
- installation clears the low-battery warning straight away
- two-cell pack provides a spare
- Some Prius fobs use stubborn tiny screws that complicate the swap
- packaging may not match the listing photos exactly
Toyota is the largest single brand in this roundup by model count, so a dedicated kit is useful. Two CR2032 lithium cells rated at 3 volts, listed for RAV4, Highlander, Camry, Corolla, Prius, Sienna, Tacoma, Tundra, 4Runner, Avalon, CHR, Sequoia, Supra and GR86, with a 90-day manufacturer warranty and clear installation instructions.
One detail in the reviews is worth repeating. Multiple owners report that the cells are Panasonic, which matters because it answers the question of what you are actually getting inside a vehicle-specific kit. A CR2032 is a CR2032, and if the cell is from the same manufacturer that supplies major OEMs, the behaviour matches what came out of the fob.
Ratings are 4.6 stars across more than 320, an 83 percent five-star share. Owners confirm the cells fit Toyota fobs correctly and restore function. The main friction reported is mechanical rather than electrical: some Prius fobs are held closed with tiny screws that need a precision driver, and the packaging does not always look exactly like the listing photographs. Neither issue affects the battery, but both cost time.
Who this kit suits?
It suits Toyota and Lexus owners whose fob is a CR2032 smart key, which covers the overwhelming majority of current models. It is a good pick for a Camry or Corolla household with two keys, and the included instructions help first-timers.
Who should skip it?
Skip it for older Toyota heads keys with remote start or push-to-start, which use a CR2016 and are covered by a separate kit further down. Prius owners with screw-secured fobs should expect to need a small driver before starting.
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11. Jeep Dodge Chrysler CR2032 Batteries 2 Pack – Best for First-Time Installers
Key fob Battery Replacement for Jeep Dodge Chrysler (Check Fit Guide)
★★★★★★★★★★Two CR2032 cells, 240mAh
OEM-sourced
Pry tool and video included
1-year warranty
- Pry tool and installation video make the swap straightforward for a first-timer
- owners report it working immediately in Jeep fobs after installation
- OEM-sourced cells for maximum compatibility
- 1-year warranty
- No written directions
- relies on the linked video
- very small review base relative to the other listings
What separates this Stellantis kit from the others is the tooling. Two OEM CR2032 cells rated at 240 milliamp hours, plus an opening tool and an installation video, which is the combination we would hand to someone who has never opened a fob before. A pry tool is not a luxury on a fob with a tight plastic seam, and the difference between a clean opening and a cracked shell usually comes down to whether you had one.
Coverage includes Jeep, Chrysler, Dodge and Ram remotes and FOBIKS fobs, spanning Cherokee, Compass, Grand Cherokee, Wrangler, Charger, Challenger, Durango and Pacifica. The cells are described as sourced from the same manufacturer used by those brands, and there is a 1-year warranty behind the pack.
Reviews are 4.7 stars across more than 200, an 87 percent five-star share, with reviewers highlighting the helpful video, the included tool and the savings against a dealership. The two honest drawbacks are that there are no written directions, only the linked video, and that the review base is the thinnest of the vehicle-specific kits here. Neither affects whether the battery works.
Who this kit suits?
It suits Jeep, Dodge, Ram and Chrysler owners who want a tool included and are new to fob work. It is a strong pick for Wrangler, Grand Cherokee and Charger owners who want a spare cell in the same box.
Who should skip it?
Skip it if you prefer written instructions to a video, and owners of 2018 to 2024 Wrangler or Gladiator models should confirm fitment before ordering, since those fobs vary by trim and market. It is also a CR2032 kit, so it does not apply to your Ford.
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12. CR2450 Car Key Battery 2 Pack – Best for Multi-Size Households
CR2450 3V Car Key Battery (Pack of 2)
★★★★★★★★★★Two CR2450 3V cells, 600mAh
Same line in other coin sizes
Confirm code in owners manual
2 pack
- Restores remote function on vehicles including a 2022 Yukon and a Toyota 4Runner
- the same line covers CR2025 CR2032 CR2016 CR1616 CR1620 and CR1632
- two-pack keeps a spare on hand
- large stated 600mAh capacity
- Sold as a two-pack even when one cell would do
- buyer must confirm the correct cell size in the vehicle owners manual
This is the flexible option, and flexibility is the point. The same product line is offered in CR2025, CR2032, CR2016, CR1616, CR1620 and CR1632, so a household with a Ford CR2450 key and a Toyota CR2032 key can cover both fobs from one brand instead of tracking codes across two packaging styles. The cells are listed at 600 milliamp hours, and the line’s 2-pack format keeps a spare on hand. Reviews sit at 4.7 stars across more than 500 with an 85 percent five-star share, and owner reports include a 2022 Yukon and a Toyota 4Runner where the code was confirmed rather than assumed. The recurring complaints are pack quantity and the need to verify the cell size first, and the listing itself recommends checking the owner’s manual. A stated capacity figure only helps if the cell physically fits, so open the fob and read the stamp before ordering.
Buyers say the cells fit fine and get their fobs working again, which is the only test that matters here. The one point worth repeating from the listings is that the buyer has to confirm the size first, and that applies to every battery in this roundup rather than just this one.
Who this pack suits?
It suits households running more than one vehicle with different key codes, and Ford or Lincoln owners who want a paired CR2450 rather than a single cell. It also suits anyone who prefers one brand across fobs, trackers and small remotes.
Who should skip it?
Skip it if you already know your code and want a child-safe coated cell or a cold-rated pack, since neither is a selling point here. Single-fob owners should note you are buying two cells every time.
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13. Tesla Model X Fob Battery 2 Pack – The Rare CR2354
Key Fob Replacement Batteries for Tesla Model X & X Plaid Remote Key
★★★★★★★★★★Two CR2354 3V cells, 225mAh
Model X and X Plaid only
Pry tool and video included
2-year warranty
- Correct fit in Model X fobs including a 2017 example
- cells arrive at full charge and individually sealed
- opening tool included so the fob case is not scratched
- hard-to-find size in a convenient two-pack
- Some Model X owners report the cell lasting only months
- fits Model X and X Plaid only
- lowest average rating in the roundup at 4.5
The Tesla Model X key uses a CR2354, a 23mm cell that you will not find in a drugstore and that most general battery roundups ignore. This pack covers Model X and Model X Plaid only, with two CR2354 cells rated at 225 milliamp hours, a dual-purpose opening tool, an installation video and a 2-year warranty.
Reviews run 4.5 stars across 75, the lowest average in this roundup with a 79 percent five-star share. Buyers confirm the cells fit and work in Model X fobs and appreciate the tool and video, while a few report shorter-than-hoped service life. That durability feedback is worth taking seriously, and it is more likely a fob or usage pattern than a cell defect, given the same complaints appear in the review summaries for other brands.
The exclusion is simple and important. This kit does not fit the Model S, Model 3 or Model Y, which use a different card-style key, so an owner with a 3 and an X needs two different products. The Model X key is also a Bluetooth-connected device rather than a plain transmitter, and the Tesla app is a functional backup if the cell dies, which is a genuine difference from a conventional car fob.
Who this pack suits?
It suits Model X and X Plaid owners who want the correct rare cell rather than gambling on a code, and the included tool makes the first swap much less stressful. The 2-year warranty is the longest on the vehicle-specific kits here.
Who should skip it?
Skip it for Model S, Model 3 and Model Y owners, and for anyone expecting multi-year cell life, since some owners report months. If your battery warning is frequent, check whether the fob itself is the cause before reordering.
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14. Toyota Heads Key CR2016 Batteries 2 Pack – Best for Legacy Toyota Keys
Key Fob Replacement Batteries for Toyota Heads Key OEM CR2016 (2 Pack)
★★★★★★★★★★Two CR2016 3V cells, 225mAh
Traditional Toyota heads keys
Pry tool and video included
2-year warranty
- Correct CR2016 cells for Toyota traditional heads keys
- pry tool makes opening the fob easier without damaging it
- two-pack provides a spare for a second fob
- Excludes fobs with remote start or push-to-start and 2023 or newer Toyotas
- does not cover several listed Toyota models
- small review base
Older Toyota keys with a visible blade and a plastic heads shell take a CR2016, not the CR2032 used in modern smart keys. This two-pack covers that generation with 225 milliamp hour cells at 3 volts, plus a pry tool and an installation video, backed by a 2-year warranty.
Reviews sit at 4.7 stars across 92, an 86 percent five-star share. It is a small sample and we would not lean on it heavily, but what buyers say is consistent: the cells fit the intended heads key and the included tool simplified the swap. That is all this product needs to do, and the feedback says it does it.
The exclusions are more extensive than the fitment list. This is not for fobs with remote start or push-to-start, not for 2023 or newer Toyotas, and not for Sienna, Corolla Cross, Prius Prime or Grand Highlander owners. If your key has a blade sticking out and no remote start button on the heads shell, you are in the right place. If it looks anything more modern than that, use the CR2032 Toyota kit instead.
Who this pack suits?
It suits owners of an older Toyota or Lexus heads key with a blade and no remote start, and it suits anyone who wants a spare without a second order. The pry tool is a genuine help on an old tight-fitting shell.
Who should skip it?
Skip it for any Toyota with push-to-start or remote start, for 2023 and newer models, and for the specific models listed as excluded. If you are unsure which generation you have, read the code inside the fob before buying.
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15. Cadillac CR2032 Key Fob Batteries 2 Pack – Best for Cadillac Owners
Key Fob Replacement Batteries for Cadillac (2006-2023) OEM CR2032 (2 Pack)
★★★★★★★★★★Two CR2032 cells for Cadillac smart fobs
Escalade 1999-2020 and XT5 CTS SRX
Pry tool and screwdrivers included
24-month warranty
- Cells described as matching what came from the manufacturer
- packaging includes screwdrivers and a pick for opening the fob
- saves money against a locksmith or dealer battery service
- reported to give good battery life after installation
- Not compatible with 2021-2025 Cadillac models including Escalade CT4 CT5 Lyriq Optiq Vistiq and Celestiq
- smallest review base among the vehicle-specific kits
Cadillac owners get the same CR2032 as everyone else in this generation, but the fob is a pain to open, and that is where this kit earns its place. Two CR2032 cells, a pry tool, screwdrivers and an installation video are included in the packaging, and the listing states a maximum range of 165 feet and no programming required.
Fitment covers Escalade from 1999 to 2020 along with XT5, CTS, SRX, XT4, XTS, XT6, ATS, DTS, CT6 and STS. The 24-month warranty is the longest in the roundup, and buyers report good battery life after installation along with cells that match what the manufacturer supplied.
The warning is the model-year cliff. This kit is not compatible with several 2021 to 2025 Cadillac models, including the Escalade, CT4, CT5, Lyriq, Optiq, Vistiq and Celestiq. At 4.7 stars across 56 reviews it also has the smallest review base of the vehicle-specific kits, so treat the fitment list as the reliable part and the ratings as supporting detail. Check your year first, always.
Who this kit suits?
It suits Cadillac owners with an Escalade from 1999 to 2020, or an XT5, CTS, SRX or CT6, who want the opening tools in the box. The included screwdrivers and pick save you from improvising on a tight shell.
Who should skip it?
Skip it for any 2021 to 2025 Cadillac, including the Lyriq and other EV models, and read the code in your fob if you are unsure. A Cadillac and Chevrolet household may prefer one general CR2032 pack instead of two brand kits.
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How to Choose a Key Fob Battery in 2026?
Choosing well takes four decisions in this order: confirm the code, pick the brand and packaging, match the pack size to how many fobs you own, and check whether your climate argues for a specific temperature rating. Get the first one right and everything after it is easy.
Confirm the code before you buy anything
Open the fob and read the code stamped into the plastic beside the cell, or printed on the inner label. It takes two minutes and eliminates the single biggest source of wasted purchases. If the shell will not open, check the vehicle-specific fitment list for your make and model year above rather than buying the most common cell. Do not buy a CR2032 because it is the default; buy the one your fob asks for.
CR2032 versus CR2025 versus CR2450: what actually changes?
The CR2032 is 20mm by 3.2mm and carries the most capacity of the three. The CR2025 is the same diameter at 2.5mm, which is roughly 35 to 40 percent less capacity, and a CR2025 dropped into a CR2032 slot usually makes poor contact because the cell is not clamped. The CR2450 is 24.5mm by 5.0mm, about 40 percent wider, and is the Ford and Lincoln code. Capacity and clamping are what decide fitment, not the voltage, which is 3V across all three.
Name-brand against generic cells, and the Panasonic question
For most fobs the honest answer is that any decent lithium coin cell works, and the difference shows up in consistency rather than in the first week. The reports of dollar-store cells dying in three or four weeks are common enough to take seriously, and the same owners often see a year or more from a name-brand cell in the identical fob. Our own reading of the product data points the same way: the premium packs here publish capacity figures and storage guarantees, and the generic option publishes neither.
On Panasonic against Duracell and Energizer, enthusiast forums repeatedly recommend Panasonic cells without offering evidence, while owner reports elsewhere favour Duracell or Energizer. We would not claim one brand is universally more durable. What separates them in the data is packaging standards and temperature range, and on those measures the Panasonic packs lead on child-resistant packaging to IEC and ANSI standards while the Energizer pack leads on its published -22 F operating floor. Choose on the criterion your situation actually rewards.
Child safety is a real selection criterion
A 20mm lithium coin cell is a genuine ingestion hazard, and coin cell ingestion injuries are among the more serious battery accidents in a home. Three features matter: a bitter coating that makes the cell unpleasant to swallow, Color Alert dye that shows in a mouth, and packaging a child cannot open alone. The Panasonic packs meet the IEC 60086-4:2019 and ANSI C18.3M Part 2:2024 standards, the Energizer pack uses the 3-in-1 Child Shield, and the Duracell pack coats both faces. The Amazon Basics cells are uncoated, which is good for contact and bad for a house with a toddler.
Pack size, shelf life and the two-key household
One fob is one cell, so a single-fob driver with one key needs one cell and a spare. Two-key households need at least two cells per vehicle, and a ten-pack covers several vehicles plus years of spares at the lowest per-cell cost. Shelf life matters more than people expect: the Duracell packs carry a 10-year storage guarantee and the Panasonic packs up to 8 years, so a spare bought now is a working spare in 2030. Small business fleets should buy the largest pack they can justify, since each vehicle in rotation is a predictable future swap. If you want the wider chemistry picture, our deep cycle battery guide covers the same capacity and discharge logic.
Do aftermarket batteries cause programming or warranty problems?
No. A key fob transmitter is a radio transmitter with a fixed pairing that was established when the fob was manufactured or programmed to your car, and the coin cell supplies power to that existing circuit. Replacing it changes nothing about the pairing, so no reprogramming is required and no aftermarket cell can break a smart-key pairing. On warranty, a battery is a consumable, and fitting your own cell is ordinary maintenance; if a warranty question ever arises it concerns the fob or the module, not the cell chemistry. This is the single largest purchase anxiety in the category and it is unfounded.
Cold climates and hot climates
Lithium coin cells lose available capacity when cold, which shows up as a fob with reduced range on the first freezing morning rather than as a sudden failure. The Energizer four-pack publishes -22 to 140 F, the most cold-tolerant rating in this roundup, and it is the pick for northern drivers. The Panasonic packs start at 14 F, which is fine in a temperate climate. Heat works the other way: sustained dashboard heat shortens long-term life, so storing a spare in the glovebox in summer is better than leaving it on the parcel shelf.
What drains a key fob battery fastest?
Four things shorten cell life more than anything else. The first is how often the transmitter is used: a fob that is pressed a dozen times a day works harder than one that mostly sits in a pocket. The second is temperature, covered below. The third is the panic button, because holding it puts maximum transmit current through the cell for seconds at a time, and repeated use in a car park shortens its life noticeably. The fourth is signal distance, since a weak transmitter or a long-range push-to-start system asks the cell for more power to reach the vehicle. Leave an extra smart key inside the cabin permanently and it can keep hunting for a connection it cannot make, which is one reason a spare key stored in the house still dies.
Where to buy, and the dealer comparison?
A drugstore or hardware store will have a CR2032 in a branded pack, and that is a perfectly good cell for a single fob. Online marketplaces are better for multi-packs, harder-to-find codes like the CR2450 and CR2354, and vehicle-specific kits with a pry tool included. The dealer parts counter is the worst-value option in this category: it bills a service fee for a two-minute swap and hands you a cell that is often the same 3V coin cell you just bought elsewhere. Members of the audience who maintain larger batteries tend to enjoy our RV battery guide for the same reason, understanding the chemistry before paying anyone to swap a cell.
New Battery, Fob Still Dead: The Order We Use
This is the problem nobody in this category answers properly, and it is the most repeated complaint in the forums: a fresh battery goes in and the fob still does not lock, unlock or respond. Work through these in order, cheapest and most likely first, before you buy another battery.
1. Confirm the code is right. A CR2025 in a CR2032 slot, or a CR2032 where a CR2450 belongs, will not clamp the contacts. Reopen the case and compare the printed code with the cell you installed. This accounts for a large share of repeat purchases.
2. Clean the contacts and the retaining tab. Lift the metal tab that holds the cell in place and check for white or green crust, which is corrosion from a leaking cell. Wipe both the tab and the flat contact with a cotton swab and isopropyl alcohol, let it dry fully, and refit. Corroded contacts mimic a dead battery exactly.
3. Seat the cell properly. A bitter-coated cell that is not pressed firmly into place reads as intermittent. Push until it sits flat and the tab closes over it with resistance. If a coated cell is causing repeat trouble, an uncoated CR2032 is a sensible swap.
4. Reset or resync the fob. Many smart keys need a sequence after a battery change, and the common pattern is pressing the lock button on the fob while holding the key close to the start button, or cycling the ignition on and off several times with the fob inside the vehicle. Manufacturer-specific sequences exist for Ford, GM, Toyota and Nissan, and the vehicle-specific kits in this roundup link an installation video for exactly this reason.
5. Use the mechanical key. If the fob has a fold-out blade, the door opens and the ignition starts regardless of the fob, which confirms the fault is in the remote and not in the car. It also gets you home while you work through the rest.
6. Check for parasitic drain. A key that stays in the ignition, an aftermarket alarm or an improperly installed tracker can pull current from the fob or the body control module and produce a dead fob with a brand-new cell. This is the step most people skip and the one that explains a fob that dies within days of every replacement.
7. Test the cell before reinstalling. A voltmeter across a fresh coin cell should read close to 3V. If it reads well under that, the cell is faulty and you have found the actual problem rather than the fob.
How to Change a Key Fob Battery Without a Dealer?
The whole job is five to ten minutes. You need a small flat-head or Phillips screwdriver, a plastic pry tool or a thin card, and the correct new cell. Many fobs have a screw hidden under a rubber plug or inside the key ring loop, so look there before you assume it is a snap-together shell.
Open the shell carefully and note the orientation of the old cell, which is almost always positive side up, marked with a plus sign on the flat face. Some fobs are the other way round, and installing the cell backwards gives you a fob that looks powered and does nothing. Remove the old cell without touching the flat contact surfaces with bare fingers, and note the code one more time while it is exposed.
Fit the new cell with the polarity you noted, close the shell, and then do the reset or resync step for your make before you test. Testing without it is the most common reason a working replacement appears to be a failure. When you are done, tape the terminals of the old cell with clear tape before recycling it so it cannot short against other coins in a bin, and take it to a household hazardous waste or battery take-back point rather than the general trash. If you also look after a boat or a trolling motor, our marine battery guide and trolling motor battery guide cover the same disposal and longevity rules at a larger scale.
Frequently Asked Questions
Is Duracell or Energizer better for car key fobs?
Both are excellent and both hold top ratings on this roundup, so the difference is narrower than the marketing suggests. Energizer publishes a -22 to 140 degree Fahrenheit operating range, which is the strongest cold-weather figure here, and uses the 3-in-1 Child Shield with Color Alert dye. Duracell publishes the higher stated capacity at 1500mAh and a 10-year storage guarantee. In a warm climate, buy whichever has the child-safety features you want; in a northern climate, the Energizer range is the deciding factor.
What are the best batteries for car key fobs?
A name-brand 3V lithium CR2032 is the best answer for the majority of fobs on the road. Our top pick is the Energizer CR2032 four-pack for its cold-temperature range and review volume, with the Duracell four-count close behind for its higher stated capacity and 10-year storage guarantee. If you own two fobs or more vehicles, a ten-pack of CR2032 cells is the most economical route and covers the same code.
How much do dealerships charge to replace key fob batteries?
Dealers bill this as a service rather than a part sale, so the fee is for labour and the diagnostic check rather than the cell itself, which is an ordinary 3V coin cell you can buy anywhere. The swap takes five to ten minutes with a small screwdriver, so paying someone to do it is rarely worthwhile unless your fob uses a screw you cannot reach. Ask for the labour fee in writing before any work is authorised, and compare it against the cost of a tow if you are already stranded.
What kind of battery does a key fob take Honda?
Most current Honda and Acura smart keys, on Accord, CR-V, Civic, Pilot, HR-V, Odyssey and Ridgeline, take a CR2032. Older remote head keys from the 2000s and early 2010s may use a CR1620 instead, and both are 16mm-class cells that are easy to confuse in the hand. Open the fob and read the stamped code rather than guessing, because the two are not interchangeable and a wrong fit gives poor contact.
Can I use a CR2025 instead of a CR2032?
Only as a short-term emergency, and we would not recommend it as a permanent swap. The CR2025 is the same 20mm diameter as a CR2032 but 2.5mm thick instead of 3.2mm, so it sits in the same slot without being clamped by the contacts. That poor contact drains the cell quickly and can leave you with a second dead fob. The CR2025 also carries roughly 35 to 40 percent less capacity than the CR2032.
Why is my key fob not working after a battery change?
Work through these in order. First confirm the code on the new cell matches the code in the fob, since a wrong size will not clamp the contacts. Then clean the battery contact and the retaining tab with isopropyl alcohol and dry them fully, because corrosion from an old leaking cell looks exactly like a dead battery. Next, seat the cell firmly so a bitter coating cannot sit between the cell and the contact plate. Then run the reset or resync sequence for your vehicle, which many smart keys require after a battery change. If it still fails, check for parasitic draw from a key that stays in the ignition or an aftermarket alarm, and test the new cell with a voltmeter to confirm it reads close to 3V.
The Best Key Fob Replacement Batteries by Vehicle in 2026
The Energizer CR2032 four-pack is the best key fob replacement battery for most drivers in 2026, because it combines the highest review volume in the category with the widest published operating range and real child-safety features. The Duracell four-count is the pick if you want the highest stated capacity per cell and a 10-year storage guarantee on your spares, and the Amazon Basics ten-pack is the value choice for two-key households and multi-vehicle drivers.
Beyond those three, match the code before the brand. CR2032 covers the majority of Toyota, Honda, Nissan, Chevrolet, GMC, Cadillac, Jeep, Dodge, Ram and Chrysler smart keys, CR2450 covers 2017 and newer Ford and Lincoln intelligent access remotes, CR2016 covers older Toyota heads keys, and CR2354 covers the Tesla Model X. If the fob is not working after a new cell, work through the contact cleaning and reset sequence above before you buy a second battery, because most repeat failures are contact corrosion rather than a second dead cell.