When I got my Blisstool I plugged it in it showed fully charged three green lights so I went hunting. After about and hour of hunting it started being very erratic. What I have found out now is that it was not not fully charged. If I plug my charger into the wall then into the machine it shows three green lights. But if I plug into the detector first then into the wall its red and charging. I hunted about 6 hours plugged it in today and green unplugged from wall and back in, green and charging.