Puffed Sealed Lead Acid batteries

[stampede_dude]

If they are puffed, they are going to be bad, from my experience. Try to find a battery surplus locally, a guy I know locally buys batteries in bulk from hospitals and businesses who use them for battery backup and replace them periodically instead of waiting until they go bad. The batteries are almost always still good since they are rarely used, and you get get them dirt cheap. I got some 12V 7Ah batteries for only $4 a pop, you just have to find them. Craigslist is also a fairly good place to try to find batteries.