I just got my truck running again and was up at wal-mart in the auto/ battery department and back by their cables they had a connector you put between the negative cable and the negative post of the battery. when your not running the vehicle for a long time you can twist this knob and it will disconnect power from your battery. looks like it'd be great for us lazy people who don't want to find out why our battery runs dead all the time. or if your not driving it every day and you want to keep the battery fresh/ keep your car from being stolen! I looked online and I can't find it, but it might be worth checking though
