David wrote:
On Sun, 11 Mar 2007 01:27:50 GMT, m II wrote:

David wrote:

Why not just take the battery out of the 2nd one and put it in
parallel with the battery in the first one? It would be more
efficient.
It would be, but there's a catch. When the time comes to recharge the
now much bigger battery, the original charging circuit probably couldn't
handle the extra current. The greater the plate area, the more it starts
looking like a short circuit as far as the circuitry goes.

Most things being now built are made down to a cost instead of up to a
quality standard.



mike

I've done this succesfully. I'm guessing the current is clamped, but
the Triplett kept 3 big-ass batteries charged in a microwave shack.


You obviously have better taste in the UPS systems available. I tried a
large 12V sealed lead acid battery once and the charge circuit DID melt
down. I was heartbroken. My visions of a two day standby time were crushed.

The small Tripp Lite I have now is acting up. The relay used to transfer
standby power over doesn't work anymore. In all fairness it is an
older 450 VA model, so I should really look around for a new one.

I should also do a complete back up...today...right...today..



mike