I was charging my blackberry passport when I the battery drained most of the way. when the light turned green I took it off the charger but not right away as I was doing something else away from that room it was in. now it won't turn on at all. this should have been prevented from happening and was not thinking it would happen to the blackberry passport phone. If I left left my blackberry passport on the charger too long I surely won't be surprised.