Quote:
Should I try charging it properly? Should I find a small 12 volt light to hook up to it to drain every last bit of power out of it first? Should I give up and buy a new battery?

YIKES!

Well, I wouldn't give up without some experiments. I think I'd try draining it down some more and then hooking up the charger the right way.
Be sure to check the fluid level.
Keep safety in mind, too!
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10101311 (20GB- backup empeg)
10101466 (2x60GB, Eutronix/GreenLights Blue) (Stolen!)