... charger for 3.7V li-ion battery. Input voltage: AC100-240V,charging current: 2A, full charging voltage: 4.2V max. Product Name: Li-ion battery ... optional- Ouput over-volatge protection, output short-circuit protection, reverse-battery protection- Hi-pot test: AC3000V, less than 0.5mA, 5 ... also provide 4.2V, 8.4V, 12.6V,16.8V battery pack charger. The MOQ each is 500 units. Paypal is welcome.