Charge your batteries with the Efest PRO C1 Charger. The Efest PRO C1 Charger is a simple and cost-efficient charger designed by Efest. The Efest PRO C1 Charger is a single slot charger with Micro USB input and charges at 1A. The LED indicator light is red when your battery is charging and turns green when the battery is fully charged. The Efest PRO C1 Charger can charge different types of 3.6V/3.7V lithium batteries commonly used in electronic cigarettes, flashlights, electric tools, and more.