The Energizer(TM) 1-hour charger is one of the fastest charger on the market, recharging batteries in 1-hour or less. Compatible with NiMH AA, AAA rechargeable batteries it features an easy-to-read LED displays for detection of bad batteries and charging status. The charger is equipped with an automatic shut-off when the charge is complete. You can conveniently charge batteries from your car with the adaptor included. Choose the Energizer 1-hour charger because time is precious.