https://selfless.wiki/wiki/12_....Facts_About_Car_Keys
Key Fob Repair: Replacing the Battery The buttons on key fobs can be damaged and stop working after being jostled in pockets and purses. This issue can be resolved by replacing the small battery that is typically found in the snap-out case that comes with the majority of car fobs. If the contacts on the key fob are worn, a new replacement might not be enough to make it work again. There's an easy fix you can do at home: Replace the Battery It's possible to change the battery if your key