A key fob battery may look simple, but choosing the wrong diameter can turn a quick replacement into a frustrating trip to the hardware store. The most reliable approach starts with the battery code printed inside your fob, not the shape of the coin cell or the vehicle model alone. This guide covers common CR2016, CR2032, CR1620, CR2450, CR2025, and CR2430 options for drivers, households, and anyone maintaining several small electronic devices.
Most fobs use a 3-volt lithium coin cell, but matching the code matters more than appearance. Dimensions and packaging also influence storage, handling, and household safety.
The Picks In Brief
PHILIPS CR2016 3V Lithium Coin Cell Batteries, 5 Count for Car Key Fobs
PHILIPS CR2032 3V Lithium Coin Cell Batteries, 5 Count for Car Key Fobs
Duracell CR1620 3V Lithium Coin Battery for Watches & Key Fobs
PHILIPS CR2450 3V Lithium Coin Cell Batteries, 5 Count for Car Key Fobs
PHILIPS CR2025 3V Lithium Coin Cell Batteries, 5 Count for Car Key Fobs
PHILIPS CR2430 3V Lithium Coin Cell Batteries, 5 Count for Household Devices
PHILIPS 8-Pack Rechargeable AA Lithium Batteries with Type-C Charger
The Strengths Of Each Pick
The CR2016 code matters here because this cell has a thinner profile than the CR2032 covered later. It fits compatible key fobs, smart locks, and household electronics while staying compact enough for tight battery compartments.
A five-cell pack suits households that maintain multiple remotes or vehicles, and the stated 10-year storage life helps during long periods between replacements. You still need to confirm the code printed inside your device, since similar-looking coin cells can have different thicknesses.
What Earns Its Place
- The five-cell count supports several vehicles or spare household devices.
- Child-resistant packaging helps limit direct access to the small cells.
- Leak-resistant construction suits storage in a vehicle or utility drawer.
- The stated storage life reduces concern about unused cells aging quickly.
Small Caveats
- Five cells remain spare inventory to store securely, particularly around children.
- Coin-cell codes must be checked because dimensions alone can be misleading.
Key Facts
Made For
Drivers and households with several devices clearly marked CR2016 benefit most from this pack.
Look Elsewhere When
Owners of devices marked CR2032 should choose PHILIPS CR2032 3V Lithium Coin Cell Batteries instead.
Among the common coin cells, CR2032 appears across a particularly broad mix of key fobs and compact electronics. The 3-volt lithium format supplies the expected voltage, while the code gives you a more dependable compatibility check than visual comparison alone.
Five cells make this a practical pantry-style battery supply for families with several compatible devices. Depending on your setup, you may also use the pack for smart locks, small remotes, and other household electronics that call for CR2032 cells.
Benefits That Matter
- Broad device coverage makes one pack useful beyond a single vehicle.
- The five-cell quantity reduces repeat purchases during routine maintenance.
- Leak-resistant construction suits mixed garage and drawer storage.
- Child-resistant packaging adds a useful layer around each small cell.
Points To Note
- CR2032 cells will not replace thinner CR2016 batteries in devices designed for the smaller format.
- Keep unused cells in their original packaging and away from children.
- The battery compartment must have enough clearance for the thicker CR2032 body.
Feature Snapshot
Right Fit For
Households managing multiple CR2032-powered locks, fobs, and remals benefit most from the five-cell format.
Another Choice May Suit
A single replacement may be more practical with Duracell CR1620 3V Lithium Coin Battery for Watches & Key Fobs.
The CR1620 format is smaller than the Philips options in this roundup, which makes the code particularly important for watches, security devices, and compatible key fobs. Its one-cell pack keeps storage simple for someone replacing a single device battery.
This choice works well for a single car, watch, or compact electronic device rather than a household reserve. You may find the smaller quantity inconvenient across multiple fobs, but it also limits the number of loose coin cells left around the home.
A Few Strong Suits
- The 3-volt lithium format suits many low-drain watches and electronic accessories.
- A single-cell pack keeps storage compact for an occasional replacement.
- Child-resistant packaging helps restrict access to the coin cell.
Trade Offs
- The one-cell quantity offers little reserve for households maintaining several devices.
- Owners of larger CR2032 compartments cannot substitute this smaller cell.
- Storage remains a concern because loose button cells can be difficult to track.
Built With In Mind
People replacing one CR1620-powered watch, security device, or vehicle fob will find the focused single-cell format straightforward.
Reach For A Different Pick When
Households needing several spare cells benefit more from PHILIPS CR2032 3V Lithium Coin Cell Batteries, 5 Count for Car Key Fobs.
CR2450 is the larger code in this group, so it suits devices designed around a broader battery compartment. It gives you room to stock several compatible cells without repeatedly handling individual packages during routine maintenance.
The five-pack serves key fobs, smart locks, and other compatible household electronics. For most maintenance drawers, the stated 10-year storage life is useful, although you should still store the cells securely rather than leaving them loose.
What Stands Out
- The five-cell quantity supports several compatible vehicles or household devices.
- A larger 3-volt format fits equipment designed for CR2450 cells.
- Leak-resistant construction supports storage in varied indoor locations.
- Child-resistant packaging limits casual access to the coin cells.
- The stated storage life makes unused emergency replacements less concerning.
Practical Considerations
- The larger diameter means it cannot substitute for CR2016, CR2025, or CR2032 cells.
- Unused batteries still belong in their packaging and out of children’s reach.
Important Details
Who Will Love This
Households with several larger CR2450-compatible fobs, locks, or electronics benefit from the five-cell supply.
Where A Sibling Pick Shines
Devices marked CR2032 call for PHILIPS CR2032 3V Lithium Coin Cell Batteries instead of this larger format.
CR2025 offers another common code for compatible fobs and compact electronics, with a diameter that differs from the thinner CR2016 and CR2032 cells. The printed code inside your device remains the decisive fit check.
You get five cells for several compatible remotes, locks, or vehicles rather than one isolated replacement. The stated voltage tolerance and long storage period are useful specification details for shoppers who want stable output from backup cells, provided each cell is stored as directed.
Key Advantages
- Five cells cover several CR2025-compatible devices in one maintenance session.
- Steady 3-volt output suits electronics with consistent power requirements.
- The stated 10-year storage period helps protect unused backup inventory.
- Leak-resistant and child-resistant packaging support household handling.
Details To Watch
- Code matching is essential because nearby coin cells may not fit the same compartment.
- Keep spare cells packaged and away from children.
- A five-pack can create more inventory than a household with one device needs.
The Main Details
The Right Fit
Drivers and households maintaining multiple CR2025-compatible fobs, remotes, or locks benefit from this five-cell pack.
Consider Something Else When
A single-device owner may prefer Duracell CR1620 3V Lithium Coin Battery for Watches & Key Fobs when that code matches.
The CR2430 format adds another household option for compatible key fobs, remote controls, scales, and similar devices. Compared with the CR2450 pack, it targets a distinct compartment size, making the printed model code essential.
Five cells suit a family that prefers keeping a few matching replacements together. The child-resistant blister pack and stated storage period support routine household organization, though you still need to keep each cell secured from children.
Where It Excels
- The five-cell pack covers multiple compatible household electronics.
- A stated 10-year storage period helps with infrequently used devices.
- Stable voltage output matches the needs of compatible low-drain electronics.
- Child-resistant blister packaging helps restrict access during storage.
- Leak-resistant construction suits a dedicated maintenance drawer.
Small Limitations
- CR2430 cells do not fit equipment designed for a different coin-cell diameter.
- The pack remains more than one device may require.
- Damaged packaging can make loose coin cells harder to organize safely.
Whose Shelf It Belongs On
Households using CR2430 cells in fobs, remotes, scales, or similar electronics will find the multi-device coverage useful.
Skip It When
Smaller devices marked CR2016 or CR1620 suit PHILIPS CR2016 or Duracell CR1620 respectively.
This is the outlier in the roundup: rechargeable AA lithium batteries are larger than coin cells, so they suit controllers, remotes, and household devices designed for AA power rather than a key-fob coin compartment. Replacing a CR2032 fob with one of these cells will not work.
Its appeal comes from the integrated Type-C charging system and storage case. For a gaming setup or a house full of AA-powered remotes, that convenience can outweigh the larger footprint, particularly over repeated recharge cycles.
The Case For It
- Eight rechargeable cells support several compatible household devices.
- The integrated Type-C port simplifies charging from compatible power sources.
- A built-in storage compartment keeps the cells and charging setup together.
- The stated 1.5-volt output targets AA devices that accept that voltage.
- A stated cycle life favors regular use over disposable-cell replacement.
Where It May Fall Short
- The AA format cannot replace a coin cell inside a conventional key fob.
- Device compatibility matters because not every product accepts rechargeable 1.5-volt lithium cells.
- The integrated charger makes the set bulkier than a small pack of coin cells.
Technical Highlights
Made For
Gamers and households with several AA-compatible controllers, remotes, or electronics benefit from the rechargeable set.
Not Your Match When
Your vehicle requires a coin cell, making PHILIPS CR2032 3V Lithium Coin Cell Batteries the more suitable choice.
Matching the Battery Code Before You Buy
Start with the code printed beside the battery compartment, usually inside the key fob casing or near the battery tray. Codes such as CR2016 and CR2032 identify exact formats, while the number following “CR” connects to the cell’s dimensions and electrical design. Voltage alone is not enough to confirm compatibility.
Compare Codes and Dimensions
Two batteries can both provide 3 volts while having different thicknesses, which can prevent a compartment from closing correctly. Compare the full code and check the listed dimensions against the original cell before ordering. For vehicles sharing a fob across multiple drivers, replace every matching low-voltage coin cell together to keep operation consistent.
Check the Device’s Requirements
Some key fobs and remotes state the required battery type on the case, near the compartment, or in the vehicle manual. Smart locks, watches, cameras, and small sensors may use the same voltage but a different code. The PHILIPS 8-Pack Rechargeable AA Lithium Batteries with Type-C Charger belongs in this discussion only for AA-powered devices, not coin-cell fobs.
Think About Storage and Quantity
A five-cell pack makes sense for households managing several vehicles or compatible electronics. A single cell reduces unused inventory, while a multi-pack helps during routine maintenance. Store lithium coin cells in their original protective packaging, away from children, terminals, moisture, and extreme heat.
Preserve Your Key Fob During Replacement
Work on a clean surface with the key fob facing downward so the compartment cannot open unexpectedly. Avoid bending metal tools against the cell, and confirm the replacement sits flat before replacing the cover. Resetting the fob or device depends on the vehicle and electronics involved.
Practical Checks Before You Order
Mistakes Worth Dodging
Do not choose by vehicle make, diameter impression, or 3-volt rating alone. Coin-cell codes determine the required dimensions, and the rechargeable AA option has no place inside a conventional fob compartment. Check the packaging, compare the old and new cells, and keep spare cells secured from children.
Why Top Tier Costs More
Multi-packs and reinforced packaging mainly reduce packaging waste, simplify storage, and provide several cells at once. A single-cell option can be more sensible for one watch or fob, while a five-pack is more useful across vehicles and household devices. Choose the quantity and code you will actually use.
Frequently Asked Questions
How Do I Know Which Battery My Key Fob Uses?
Open the fob carefully and look for a code such as CR2032 or CR2016. The vehicle manual may also identify the required battery.
Can Any 3V Coin Cell Replace My Key Fob Battery?
No. A matching voltage does not guarantee matching dimensions, so confirm the complete battery code before purchase.
Is CR2032 the Same as CR2016?
No. Both can provide 3 volts, but they have different thicknesses and belong in differently sized compartments.
Are Rechargeable AA Batteries Suitable for Key Fobs?
Most coin-cell key fobs require a small lithium cell rather than an AA battery. Rechargeable AA lithium is better suited to compatible controllers and larger remotes.
Should Spare Coin Cells Stay in Their Packaging?
Yes. Keeping them packaged helps organize replacements and limits access by children. Store them away from moisture and heat.
Final Verdict
Choose the battery by its full code, not by diameter alone or a broad device category. PHILIPS packs cover most of the common coin-cell formats in this roundup, Duracell suits a focused CR1620 replacement, and the rechargeable AA set serves larger electronics rather than conventional key fobs.
