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The 2010 Honda Civic uses a CR1616 3V battery for its key fob. The key fob allows you to unlock and lock doors, trigger a panic button in some models, and access the trunk in others. If the key fob stops working, it may indicate a dead or dying battery or issues with the car's battery. Typically, the key fob battery lasts around 3 to 4 years. To replace the battery, you'll need a small screwdriver to remove the screw on the back of the key fob and install a new battery.
The 2010 Honda Civic's remote key fob requires a cr1616 3v battery for operation.