this charger im ASSUMING has "SUPER safe circuitry", when this charger said my ego batty was full(even with the green led ON left sitting for an hour) i took it off and put the Ego onto an older charger i had laying around. it started charging again and after 10 minutes, the old charger turned green. so with that i ASSUME this charger only charges batteries up to 85-95% and then stops.

now i have noticed, as well as others who purchased this and left a reveiw, sometimes this charger sometimes doesnt detect a battery. i found it happens ONLY when the charger is currently powered as you attach the battery. simply remedy is to attach the battery to the charger, and then proceed AFTER to plug it into a power source.