First Question: I was give 17 UPS12-140 Batteries. the batteries seem to be dead. can they be brought back to a usable state. how do I check them out.
Second Question: I was also given a second batch a batteries. 31 RBC11_2(2x12V/17AH). They are two batteries stuck together with double sided tape and have a fuse and quick disconnect plug on them. what would be the best way to tie them together into a battery bank to get the best use from them.