The most common answer is that Chrysler key fobs typically use a CR2032 3V lithium coin cell, though some older or alternative designs may use CR2025 or CR1616. Check your specific fob to be certain.
Key fob batteries vary by generation and model year as designs evolved. The exact size is usually printed on the battery itself or listed in the vehicle’s owner’s manual. This guide outlines the typical sizes you may encounter, how to identify the correct one for your vehicle, and best practices for replacement.
Common battery types by fob era
Fob designs have shifted over time, with the majority of modern models using one of a few standard coin-cell sizes. Here are the sizes you’re most likely to encounter:
- CR2032 — 3V lithium coin cell; the default for most current Chrysler, Dodge, Jeep, and Ram key fobs. Fits the majority of two- or three-button shells.
- CR2025 — 3V lithium coin cell; thinner than the CR2032 and used in some compact or earlier fobs. Check fit before replacing.
- CR1616 — 3V lithium coin cell; found in older, smaller fobs with limited space. Size compatibility should be confirmed before replacement.
When in doubt, match the replacement to the exact size printed on the old battery or stated in the manual. Using the wrong size can damage the fob or prevent it from functioning properly.
How to identify the correct battery for your fob
To avoid guessing, use these steps to confirm the exact battery size for your Chrysler key fob:
- Remove the mechanical key or carefully pry open the fob to access the battery compartment. The seam or a small notch usually indicates where to open it.
- Look at the battery itself; the size is typically printed on the battery (for example, CR2032, CR2025, or CR1616).
- If the battery isn’t labeled, measure the diameter and thickness: CR2032 is about 20 mm in diameter and 3.2 mm thick; CR2025 is 20 mm by 2.5 mm; CR1616 is 16 mm by 1.6 mm.
- If you still can’t determine the size, consult the vehicle’s owner’s manual or contact a Chrysler dealer or locksmith for the exact specification for your model and year.
Once you confirm the correct size, you’re ready to replace with a fresh battery of the same type and size.
Replacement tips and safety
Follow these best practices to ensure a reliable replacement and protect the fob’s internal components:
- Use a fresh battery of the exact size determined for your fob (CR2032, CR2025, or CR1616). Do not force a larger battery into a shell that isn’t meant to hold it.
- Handle the new battery by its edges and avoid touching the exposed terminals with fingers to prevent oils from causing poor contact.
- Gently pry open the fob using a plastic tool or a non-marring coin; avoid metal tools that could scratch or short the circuitry.
- Ensure the battery sits flat in its holder and the contacts align correctly before snapping the cover back in place.
- Test the fob immediately after replacement by standing a short distance from the vehicle and pressing the buttons. If the fob doesn’t respond, re-check the battery orientation and seating, and consult the manual for any re-sync steps.
Note: Some Chrysler, Dodge, Jeep, and RAM models require re-synchronization after battery replacement. If the remote still doesn’t work, refer to the owner’s manual or contact a dealer for model-specific re-pairing instructions.
Battery recycling and environmental notes
Dispose of used batteries responsibly. CR2032, CR2025, and CR1616 cells should be recycled where local programs exist. Do not throw them in regular trash. Keep them away from children and pets until properly disposed.
Summary
For most modern Chrysler key fobs, the standard replacement battery is a CR2032 3V lithium coin cell. Some older designs may use CR2025 or CR1616. To ensure accuracy, inspect the current battery, check the owner’s manual, or contact a dealer for your specific model and year. When replacing, use the correct size, handle the battery carefully, and test the fob afterward; some vehicles may require a re-synchronization after battery replacement.