Key fob battery sizes
Car key fobs use a handful of 3-volt lithium coin cells. Pick a size to see which vehicles use it.
| Battery | Diameter | Thickness | Vehicle models listed |
|---|---|---|---|
| CR2032 | 20 mm | 3.2 mm | 283 |
| CR2450 | 24 mm | 5.0 mm | 46 |
| CR2025 | 20 mm | 2.5 mm | 38 |
| CR1620 | 16 mm | 2.0 mm | 37 |
| CR1632 | 16 mm | 3.2 mm | 27 |
| CR2016 | 20 mm | 1.6 mm | 19 |
| CR1616 | 16 mm | 1.6 mm | 8 |
| CR2412 | 24 mm | 1.2 mm | 1 |
Source: Energizer Key Fob Battery Replacement Guide (©2023, model years 2014–2023), PDF checked 12 November 2026. “—” means the source lists no battery for that year and key type; it does not mean the vehicle has no fob.
Coin cells are dangerous if swallowed. Keep new and used batteries away from children. Energizer warns that swallowing can cause serious injury or death in as little as 2 hours; if a battery may have been swallowed, get medical help immediately (US National Battery Ingestion Hotline 800-498-8666, as listed by Energizer).