My toshiba has a bad battery. I'm afraid to use it with AC in case the battery gets overcharged and destroys the laptop. If the battery is bad, will it "over charge"? (This question is for my neighbor. I keep telling him to just plug the damn thing in and if he is that paranoid, unplug when not in use. If the battery isn't holding a charge...I hope I didn't advise him wrong but he needs the advice of thousands then looks for the vast majority. I hope he gets 1000 different answeres!)