Product name: 18650 Charger Product model: BH-042100-02U BH-042100-04U Features: 2/4 slots independent charging Input voltage: DC 5V 1-2A Output voltage: DC 4.2V 1000mA Compatible battery model: 10440 14500 16330 16340 16650 14650 18350 18500 18650 Protections: overcharge protection, overcurrent protection, over temperature protection, short circuit protection, reverse connection protection, over discharge protection Features: The charger USES the universal Android charging interface for input and charging. It can directly output 5V power through the phone’s charging seat, charging pad and on-board USB to charge and access the power. The indicator light is green; the red light is on when charging, and the green light is on when charging is full. The charger is controlled by intelligent charging management IC. When the charging voltage reaches 4.23V, it will automatically stop charging without causing overcharging.