Monster Cable MB 8-PRO CHG AA Pro Charger w/ 8 2100 mAh Powercells Can charge up to four 2,100mAh AA or AAA batteries simultaneously in just over an hour Smart Digital Charger circuitry that delivers the exact amount of charge your battery needs Smart charging technology supplies power to each power cell individually Features four individual status LEDs that light up when charging, turn off when done, and flash indicating a bad battery Comes with both an AC adapter and a 12-volt car adapter, as well as eight AA rechargeable 2,100mAh batteries