I picked up an APC Smart 750 UPS the other day. I have several sets of batteries that are in perfect condition, pretty much brand new from a Tripp Lite 750VA UPS.

I wanted to built a separate enclosure for the batteries and connect them to the APC.

So I was wondering if anybody could help me find a tech sheet on what the charging circuit in these things can handle. Other suggestions and comments would be great to, I just don't want to cause a fire or something like that.