OLIGHT Omni-Dok Universal Battery Charger For 18650 RCR123 AA AAA 16340 17670 14500 with AC adapter and 2 X EdisonBright AA to D type battery spacer/converters 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 EdisonBright AA to D battery converter spacers included. These allow use of rechargeable AA batteries in D battery equipment.