Notice: The Battery and Charger are selling separately. To Know How Long The Battery Need To Charge: Charge Time = Battery Capacity × 1.25 ÷ Charger Output 1. Trickle output After completion, it will automatically switch the output to charge with low current and extend battery life. 2. 4 slot charging Can charge 1-4 AA / 5 or AAA / 7, can mixed. Can support both size , 3. LED indicator When charging, the red light will always on. finish charging also red light always on No battery and abnormal LED light will not light. 4. Constant voltage charging Use imported AC adapter to keep constant voltage charging safe and efficient standard current charging Plug: China plug Safety and security: Overflow, overcharge, overtemperature, outdated protection. Short circuit, leakage protection, safety and security, no disturbance.