The Sunpak Ultra-fast Charger can recharge 2 or 4 AA or AAA NiMH batteries in as little as 2 hours. Power can be supplied by AC or DC power options. The SunPak Ultra-fast Charger kit inlcudes AC and DC adapters, and 4 NiMH 2650maH AA batteries. Features Recharges 2 or 4 AA or AAA Ni-MH batteries in as little as 2 hours Powered by a standard AC adapter or by a 12V power plug while on the road. Intelligent microprocessor controlled LED indication of defective batteries Negative delta V automatic charge cut-off detection Built in safety timer control for overcharge protection Automatic charge selection for AA and AAA batteries Short-circuit protection Mechanical and electrical protection against wrong polarity LED lamp to indicate: red LED lamp on = charging, green LED lamp on = ready