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Im not looking for a laptop battery doubler or anything, basicly my roommate gave me his old laptop and the battery on it doesnt seem to be holding a charge. I was wondering if anyone knew of a program I could run that might be able to diagnose whats wrong with the battery if its saveable or if its screwed and just have to go spend the $$$ for a new one. Thanks!

Buy a new battery. If it is an old battery then it is highly likely that its just knackered. Lithium Ion/Polymer batteries will wear out even if you're not using them.