my wife charged it while i was at work. she said it was on the charger for about 5 hours. if i plug it back in to the charger now, the button on the battery blinks 5 times and then goes off. the light on the charger is a solid green. When i took the tank apart with it connected to the battery where i could see the coil, i did not see the coil heating up at all when i press the button on the battery. what i find strange is that there is a led behind the button on the battery but when i press it the light doesn't come on. is that how the battery is supposed to operate, or is the light supposed to come on when the button is pressed? if the light is supposed to come on, maybe the switch on my battery is bad?