Can anyone think of a reason not to attach a car battery in place of the sealed battery in a battery backup system? I've got a few of these carcasses laying about because it's always been cheaper to buy a new one, but a cheap car battery could breathe new life into them. Clearly, I don't want to turn it over and spill acid, but think of the backup time available! Thanks, Ed -- http://www.piclist.com hint: To leave the PICList mailto:piclist-unsubscribe-request@mitvma.mit.edu