Charges AA and AAA batteries
The battery charger recharges in pairs, accommodating two or four AA or AAA rechargeable Ni-MH batteries at a time. Once properly inserted, the unit begins to recharge automatically, and its full-charge, cut-off function protects batteries from being overcharged. Even more, it provides protection against wrong polarity charging or reverse battery installation. A red LED light provides at-a-glance info: on means it’s charging, flashing means alkaline or bad cell detection, and off means charging is complete.