I've hacked quite a few laptop batteries and replaced cells. Hacked damn near everything else. The first attempt at cracking the case on an OE PSP battery resulted in my just _barely_ nicking the inner mylar covering. There was a small puff of smoke (that was the magic leaking out) and then about a 1/2 long flame shot out of the damn thing.
Needless to say I was on my way to the sink to get it under water and out of oxygen. Of course that may not have been the best idea either, but it was better than my desk going up in flames...
Needless to say I was a bit more careful on the next attempt
