This is the charger that fully refreshes rechargeable NiMH batteries, renews their original usable lifespan, and eliminates the memory effect common among other chargers that depletes a batterys usable life after repeated use and recharging. The charger analyzes up to four rechargeable AA or AAA NiMH cells of any capacity, detects defective and non-rechargeable alkaline cells, and unlike typical chargers, has an LCD that clearly indicates when batteries have fully charged and discharged. Designed to monitor and detect temperature changes, the charger is equipped with a cut-off safety timer that protects batteries from overheating and overcharging. Includes four high-quality AA Ni MH rechargeable batteries with a capacity of 2700mAh which sets the industry standard. Dual-voltage for international use. Plugs into AC via a 6' power cord. 1 1/4" H x 3" W x 5" D. (5 oz.)