This is the battery charger that revitalizes AA, AAA, C, D, and 9-volt disposable batteries. The device charges up to four batteries simultaneously and has a sophisticated sensor that automatically identifies each battery type and their condition prior to charging. It recharges Alkaline and Titanium batteries up to 15 times, RAM batteries up to 25 times, and NiCd and NiMH batteries up to 1,000 and 600 times, respectively. With a built-in battery tester, overcharging protection, and LEDs that display charge levels. AC plug. 9 1/4" L x 5 3/4" W x 2 1/2" H. (2 lbs.)