Having a clue would be as opposed to me, who does not. Anyway, I had a m401 battery that suddenly stopped working, and it "seemed" that it wouldn't draw. So in the manner of all people who are ignorant enough to be dangerous, I decided to fiddle around with it. Anyway, I stuck a paperclip down the air hole, mainly incase something was clogging it, and it went scorching hot, and now the led has been flashing for about 5 minutes. So, what, is it about to blow up? And, ya, I get that I am, in this instance, an idiot......