Titanium Innovations 16 Bay/Channel Genius Fast Rechargeable Battery Charger Unit for NiMH AA/AAA Batteries - MD-1600L CONVENIENT BATTERY CHARGING  power and recharge up to 16 NiMH AA/AAA batteries at the same time, perfect for when you use a high volume of batteries; patented technology allows you to charge different size/capacity batteries simultaneously EASY-READ LCD SCREENS  indigo backlit LCD screens monitor and indicate the charge/discharge state of each individual battery CHARGING ON-THE-GO  powered by an external AC adapter for indoor use or by a 12V DC cigarette lighter; the sleek and compact design means you can use it both at home and on the road STATE OF THE ART CHARGING  GENIUS Precision Microprocessor optimizes battery charge and provides lifespan protection; additional features include safety auto-shut off, 2 USB sockets, short-circuit protection and defective battery detection DISCHARGE FUNCTION  refreshes and renews batteries for the deepest and fullest charge; separate bays allow you to refresh some batteries while charging others