My mom's car uses an electronic key (for entry and to start the ignition). Her key works fine, but the spare key which I use when I need to drive her car isn't quite as reliable. Sometimes I have to stand there and push the button a million times to lock or unlock the car (which you can't do using the manual key because the alarm will go off). It always works in the ignition, but the buttons on it are another story. Her car is a 2001 model. Is there a battery that needs to be replaced in the spare key? Or why doesn't it work like it should?