i have the same problems as all of you describe.my charger light does not come on or get warm when the battery is placed into it.how do you know if it is the charger or battery.it worked fine until the carger stopped coming on.i hate to buy a charger and find out it is the battery.how do you tell without any kind of testing equipment?i only paid $50 for it about four years ago and have not used it very much around the house at all.