Universal 3.7V 4.2V adapter for charging li-ion battery.Charging current:0.6A,0.8A, ... Product Name: Universal 4.2V adapter for charging 3.7V li-ion battery Product Feature:- Input voltage: AC100-240V ... Ouput over-volatge protection, output short-circuit protection, reverse-battery protection- Hi-pot test: AC3000V, less than 0 ... 4V, 12.6V,16.8V, 21V, 25.2V battery pack charger. The MOQ each is 500 units. ...