Well, after 101,000 miles it looks like I need to replace my original battery in my XK. I have a winch which I rarely use. The rest of my use is whatever they put on the 07 Limited, Hemi,sunroof, NAV, stereo, rear DVD etc.

I assume for now it is the battery. Yesterday morning I tried to unlock the doors with the key fob and noticed they didn't work and it wouldn't start until I put the charger on for a few minutes. Drove it yesterday with stops and starts no problem but dead again this morning.

I don't want to replace the battery and find out there was an electrical drain somewhere.

Anyway, everybody still happy with Optima Yellow Tops? Any other suggestions on battery choice or how to verify it isn't a discharge drain?