OLIGHT Omni-Dok Universal Battery Charger, 2X 3400mAh Protected 18650 Rechargeable Li-ion Battery, 2X RCR123A rechargeable Li-ion battery with 2 X EdisonBright AA to D type battery spacer/converters Olight Omni-Dok Able to simultaneously and safely charge different types of batteries Batteries are charged independently with smart charging technology to regulate power accordingly Battery power indicators monitor individual charging status of each battery at 25%, 50%, 75% and 100% Overcharge protection stops charging when a cell has reached a full charge 2X Olight 3400mAh 18650 batteries and Olight RCR123 16340 650mAh rechargeable batteries included. Bundle includes Olight 2 x EdisonBright AA to D type battery spacer/converters