Main Features: ?Intelligent USB double-slot charger Capable of charging 2 batteries simultaneously and controlling each slot independently. ?High-quality material Made from durable and fire-retardant PC material, durable and practical. ?Automatic detection function Compatible with Li-ion and Ni-MH / Ni-Cd batteries with automatic detection Automatic detection of battery power level and automatic selection of the appropriate voltage and charging mode ( LiFePO4 and 3.8V Li-ion batteries excluded ) ?HD LCD display The energy-efficient LCD display for real-time charging information. ? Optimal heat dissipation design ? Automatic termination upon charging completion ? Reverse polarity protection and short circuit protection ? Over-discharged battery activation ? Li-ion battery restoration ? Overtime charging protection