Replacement Car Key Battery
A key fob conveniently helps you lock and unlock your vehicle, as well as open your trunk or tailgate. Your key fob might have the key built right into it, or be separate from your car key. Either way, key fobs run on batteries. While you don? need the key fob battery to start your car, you do need it for any remote functions that come with your vehicle. When the battery becomes weak or dies, you?l need to replace it.