If your key fob battery dies, it can be easily replaced. Here are the steps: 1. Slide the button and remove the metal "emergency key." 2. Use the blade of the key (or small flat screwdriver blade) at that end to carefully pry the two fob halves apart (they have snap tabs) by working around the both sides to separate top and bottom halves. 3. Remove the old battery and replace it with a single disc battery- IIRC a CR2032 (or equiv.). Note: Hold the battery around the edge to avoid contamination. 4. Line the cover back up and snap the perimeters all around. 5. Re-insert the blade key until it clicks back into place. (Note: Re-programming is not necessary).