... So there is a limit on some types, especially
if the temperature isn't monitored adequately.

That's my experience. AGMs & Gel cells are different animals.
My AGM experience is exclusively deep-discharge types...

At the recent robotics competition I mentioned in another post,
the rules require a specific 17AH gel cell - There were a surprising
number of battery failures during the competition, considering the
batteries were all new, & the matches last 150 seconds.

We played every round (we won - Go Beach City Robotics!) & had
1 battery failure, a leak. I don't approve of either the particular battery,
or the charging regime we employ, but my colleagues are all engineers,
so there's no telling them anything :)

Most failures were leaks, a few involved smoke...
-- 
http://www.piclist.com PIC/SX FAQ & list archive
View/change your membership options at
http://mailman.mit.edu/mailman/listinfo/piclist