... Universal charger for 4.2V,8.4,12.6,16.8V,21V,25.2V li-ion battery pack. Product Name: Univesal charger for li ... -ion battery pack Product Feature:- ... -volatge protection, output short-circuit protection, reverse-battery protection- Hi-pot test: AC3000V, less than ... 12.6V,16.8V, 21V, 25.2V battery pack charger. The MOQ each is 500 units ...