Input: 5V/500mA. Function: charges 1 or 2 cells at the same time, LED charging indicator. Note: 2 independent charging circuits. Output: 3.6V/3.7V 500mA/1000mA. Dimensions: 92x40x32mm. RoHS: yes. Spec info: overcharge protection. Additional information: closing voltage 4.20V ± 0.05V. Weight: 97g. Accessories: USB charging cable, with case. Protection: reverse polarity protection and short circuit protection