How often to run the engine in a Centurion?

[Mike Cecil]

I've used battery maintainers on my various batteries for years, both in the US and previously in Australia. They are different to battery chargers.

Never had a problem with a dead battery when using a maintainer. At around $30USD each, a cheap way to keep batteries fully charged but not 'cooked' or overcharged.

There were instances, of course, when a battery would not hold a charge, but each one has been well past its use by date, so not, as far as I'm aware, caused by the maintainer.

Outside storage V inside storage: the commonly accepted difference in the rate if deterioration is about 1:15, ie 15 times faster deterioration when stored outside. I knew of a motorcycle collector who had his collection in an area of cold & damp under his house. His solution was to more or less seal the room and leave a 40-watt incandescent light bulb on all the time: it gave off just enough heat to keep the cold and moisture at bay. Maybe that's a solution for the inside of a tank?

Mike