Bert the Welder wrote:
My new truck battery got killed a few days after being in the truck. Turns out the radio had got south and was draining it. Had to pull the fuse. No more radio, but no more drain on the replacement. My cheap one way battery shunt got stuck one time years ago too and drained the truck. Now I always unplug just in case.
My old truck developed a load that would kill a fully charged battery in a matter of weeks. After lots of probing I finally put a knife switch on the positive terminal and got in the habit of disconnecting the battery each time I was not going to use the truck the same day.
Overkill but no more dead batteries.
- Mark0.