What happened (MM and Lipo)

[junkman]

I forgot and left one plugged in one time for 2 or 3 weeks, the pack didn't puff, but wouldn't take a charger. It was a 3s pack, and I was able to recover 2 of the cells, and honestly I haven't really noticed any drop in their performance. Seperated them, and charged them at .25 amp nicad setting to get them up to where they would take off on lipo setting. I don't really understand if it was switched off the the extreme draw. I could see if he turned off the transmitter, and put the truck up, without shutting off the switch, then it glitched wide open or something. That is wierd.