TRUE AVR (Automatic Voltage Regulation)| Full protection for Overload, Discharge and Overcharge Super-Fast Charging (2~4 hours recover to 90% capacity) High Reliability Super-Fast Built-in Charger Battery to recharge up to 90% if its capacity within 2-4 hours Full Protection Warning system for overload, discharge and overcharge High Reliability Use of excellent microprocessor 3-Step Automated Voltage Regulator (AVR) Ensures voltage stabilization Prevents unnecessary battery life drainage