Highlights Insert the batteries in to the charger, making sure the polarity is matched up (/-). Plug the cord into the electrical outler. The indicator light will turn red when battery is not fully charged. The indicator light will turn green when the battery is fully charged. Specifications Shipping Weight (Kg):0.0709 Dimension (CM): 9.5 x 7 x 3.5 Package Contents 1 GTL AC123A / 16340 3.7V Fast Smart Charger For Li-ion Battery