The 5307263 is a plug-in charger for 2 or 4 Micro AAA / Mignon AA rechargeable batteries, automatic battery-full-detection (-deltaV), LCD display. The intelligent, microcontroller-monitored PhotoCam IV charger can charge 2 or 4 batteries of the Micro AAA and Mignon AA sizes. Backlit display : The LCD display highlighted in blue clearly informs about the charge status in 25% increments; small bar charts are easy to read even in the dark thanks to the illuminated display. Faulty cell detection, trickle charging and other features. Defective or inserted batteries are detected automatically. Overcharge protection, safety timer and inverse-polarity protection are other features of this compact, space-saving charger. When charging is complete, the device switches to smart trickle charge. This will be great news to many globetrotters: Thanks to the wide range input, the PhotoCam IV is suitable for worldwide use (via adapter) in the range of 100 - 240V.