NiteCore UM20 USB Two Cell Li-ion Battery Charger

The NiteCore UM20 USB powered management and charging system is cable of charging 2 unique batteries simultaneously. LCD display shows real time charging progress and battery level. Reverse polarity protection and temperature monitoring safely charges batteries to optimum performance. Constant voltage or constant currant charging of either Li-ion or IMR batteries with the internal intelligent charging system that automatically stops charging when the batteries are full of charge. The charger does not block a USB port as it features an external USB output port for charging external USB devices while connected to your computer or laptop. External USB or Battery switch sets priority if there is insufficient power to charge both simultaneous. Compatible with Li-ion models: 18650, 18490, 8350, 17670, 17500, 16340, 14500, and 10440. USB cable included.