After I tried several 1 and 2 amp USB chargers, and monitored an initial 1.3 amp of charging, all 4 units, plus 4 more I ordered, went to dim after 4 days on auto - not the 60 days the MANUFACTURER claimed. Repeated recharges. Yes, multiple USB chargers were used. Yes, green fully-charged lite comes on. Yes, on auto on with motion maybe a few times a day.My biggest complaint is PulseTV has not responded to numerous E mails to them. So I must do it here. POOR BATTERY LIFE.