How do I buy a universal AC adapter from Radioshack? [more inside]
posted by defmute on Jun 4, 2009 - 8 answers

So the modern practical uses for these are in guitar effects, alarm clocks, and smoke detectors. leave your effects on and they die in a couple of hours. as a backup to your alarm clock, it dies in four or five hours (not even powering the LCD). i have no idea how long these things last in a smoke detector, but my guess is the next housefire and i'm a dead man. why do these batteries suck so bad? why do we still use them? why hasn't science come up with anything better?
posted by camdan on Sep 9, 2008 - 18 answers

Can anyone tell me why a 9v battery would explode? Description of the event... [more inside]
posted by snsranch on Nov 2, 2006 - 11 answers