[The Atomic Ass]

Originally Posted by Christ

If I still had mine, I'd probably replace the (long since dead) batteries with lithium variants. I used to have a source for "dead" laptop batteries, which I could get for free, and repair for very little money. (It's often only one or two dead cells, not the whole battery.)

The UPS units I have used so far have been entirely incompatible with Lithium. They continuously charge the battery at 13+ volts, so as not to overcharge it, but so that the battery is always fully-charged.