Product Details : Charges all Energizer Recharge® AA or AAA batteries in 1 hour or less . Easy-to-read battery power gauge indicates amount of charge, and can test the charge of a single battery . Charge in your car with the included car adaptor or at home with the AC wall adaptor . Ensures a full battery charge and bad battery detection . For approximate charge times, download the User Manual . Individual charging channels, can charge 1-4 NiMH batteries at a time . World’s #1 recharge brand, according to market survey data .