The ARE-C1 18650 Battery Charger from Fenix Flashlight provides a constant-current charge and independent channels for charging two 18650 lithium-ion batteries simultaneously. It protects against short circuits, excess current and overcharging, and also safeguards against damage due to reverse polarity in the event that the batteries are installed incorrectly. The LED indicator displays the charging status of each battery. An included car adapter enables on-the-go charging. The charger runs on 100-240VAC power, enabling use all over the world.