Volvo key fob battery

Many recent Volvo keys use a CR2430; other Volvo keys use a CR2032.

Battery	Used in	Size	Capacity
CR2430	Volvo (most common)	24.5 mm × 3 mm	≈ 290 mAh
CR2032	Volvo (also used)	20 mm × 3.2 mm	≈ 225 mAh

CR2430, CR2032 at the same scale.

Volvo: starting with a dead fob

Place the key in the backup reader marked in the centre console (often at the bottom of a cup holder), then turn or press start.

To change it: release and pull out the metal key, twist its tip in the seam to split the case, and fit the new cell the same way up. Step-by-step guide.

Key types change between model years; the code on your old battery is final.