This is the battery charger that revitalizes standard alkaline batteries up to 10 times. It uses a sophisticated microprocessor and proprietary charging technology to sense battery types and their conditions prior to charging. A built-in voltmeter measures the strength of each battery and displays the increasing voltage level on an LCD panel or indicates if a battery cannot be charged. The unit also re-charges NiCd and NiMH rechargeable batteries. Charges up to four AAA, AA, C, D, or 9-volt batteries at one time; charging times vary depending upon the type and size of battery, from one to eight hours. Plugs into AC. 2 1/2" H x 7" L x 6" D. (2 lbs.)