Kindly reminder: 1.Before Bid, be sure to confirm that the interface size of this product matches with yours. Wrong size will not work!!! ( The interface size of the DC plgu is 5.5mm Round Barrel) 2. This product has many kinds of protection functions, enter the protection mode, LED lights will flashing red light. When this happens, unplug the adapter immediately and check if the circuit is short-circuited, if the electrical power exceeds the rated power of the adapter, etc.Sepcification: Input voltage: AC 110V / 220V (AC90-264V suitable for anywhere in the world voltage level). Output: DC 8.4V 1A. Output Wire length: 1.2m / 4ft. Output interface: 5.5 mm With over-current protection, over-discharge protection, over-voltage protection, overcharge protection, short circuit protection.?Enter Protection mode , with flashing red light?.Charging process LED indicator changes: 1. No-load status LED is green; 2. Charging, the first phase of constant current charging, LED indicator is red. Charge to the rated voltage into the second phase of constant voltage charging, the current slowly decreases. 3.When the battery power reaches 90-95%, LED lights turn green. At this point the charger will continue to charge with a small current until it is full.Package Included: 1x 8.4V 1A Power Adapter Li-ion Battery Charger