I tried that, but the battery is seated in the fob and won’t slide out.Replace the battery, marked 3068, by sliding it out from the fob. Make sure you put the new one back the same way.
It looks like it may help if you use a flat head screw driver to pry at the bottom of the U cover while you push the battery from the other end.I tried that, but the battery is seated in the fob and won’t slide out.