Key Fob Batteries

Replacement batteries for remote starter and car alarm key fobs — CR2032, CR2016, CR2025 and the other cells these remotes use.

Try this before buying a new remote

A flat battery and a dead fob behave identically. Intermittent operation, reduced range, needing to stand closer to the car, working sometimes and not others — all classic symptoms of a tired cell, and all easily mistaken for a failing remote.

A cell costs a few dollars. A replacement remote costs considerably more. It's worth ten seconds.

Getting the right one

The cell type is printed on the battery itself, and usually inside the fob's battery compartment. CR2032 and CR2016 look almost identical — same diameter, and the 2016 is half the thickness. They are not interchangeable.

Some remotes take two cells. Replace both at the same time — a fob running one fresh and one flat cell tends to misbehave intermittently rather than fail cleanly, which is exactly what sends people out to buy a remote they don't need.

A few remotes have a built-in rechargeable battery and no cell at all. If yours charges by cable, there's nothing here you need — leave it on charge for a few hours before concluding it's failed.