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How to Repair a Remote Key Although many remote key fobs have amazing battery life, they will eventually wear out. Some times it is as simple as changing the batteries in the device, however sometimes the issue could be more severe. One quick fix that may help is taking apart the remote, cleaning the buttons and flexing them in and out. These steps could be all you need to get your key fob to work. Battery Car key remotes utilize CR2025 or CR2032 batteries and can usually be sw