This Panasonic power pack consists of a 4-slot battery charger that includes 2 x AA eneloop rechargeable batteries, this battery charger can accommodate 4 x AA batteries that can charge at the same time easily It has an approximate 7 hours to fully charge 4 x AA rechargeable batteries with an individual voltage control function for greater efficiency Features 4 LED indicators, green light indicates that charging is in progress and this battery charger can detect the right voltage and stops charging just after overcharging This power pack includes 2 Panasonic eneloop AA rechargeable batteries, perfect choice for powering high-current consuming devices such as digital camera, personal care appliances, electric toothbrush, photo flash, wireless keyboards, mouse, game controllers, radio-controlled toys and other household devices