Volvo C40 Recharge / EC40 key fob battery
Every model year listed for the Volvo C40 Recharge / EC40 has a proven battery. The most common answer is CR2032. Rows below run oldest to newest; a year can appear twice when the car came with more than one kind of key.
- 2022-2024Smart key
CR2032
FCC ID YGOHUF8423Two sites agree: locksmithkeyless.com and bestkeysupply.com (checked Nov 1, 2026)
Find CR2032 on Amazon - 2025-2026Smart key
CR2032
FCC ID YGOHUF8423Two sites agree: locksmithkeyless.com and bestkeysupply.com (checked Nov 2, 2026)
Find CR2032 on Amazon
Changing the battery
Smart key (push-button start)
- Find the small release on the edge or back of the fob and hold it while you pull out the metal emergency key.
- Look inside the empty key slot for a notch. Put the tip of the metal key or a small flat screwdriver wrapped in tape there and twist gently until the shell splits.
- Pop the old battery out with a toothpick or plastic pick, not a metal blade, and seat the new one with the + side matching the old one.
- Reassemble, refit the emergency key, and check that the car sees the fob when you press start.
A CR2032 is 20 mm across and 3.2 mm thick. CR2032, CR2025 and CR2016 share the same width but not the same thickness, so a swap between them can leave a loose contact or a case that will not close.
Keep spare coin cells away from small children. A swallowed coin cell can burn the throat within hours; if it happens, go to an emergency room at once.