4Sevens Single-Bay Smart Charger; Wall, Car or USB; For Battery sizes 14500, 16340 (RCR123A), 17670, 18500, 18650, 26650 Compatible with the following battery sizes: 14500, 16340 (RCR123A), 17670, 18500, 18650, 26650 Plug the adapter into the appropriate outlet (wall / car / USB). Two user-selectable voltage settings: 3.6V 4.2V Two user-selectable current settings: 0.5A 1.0A