Capacity: 2300mAh LED Charging status indicators Auto shut-off (after ~11 hours) Battery overcharge protection Universal voltage (AC 100-240V) Charges 2 or 4 AA or AAA NiMH batteries at a time. Approx. Charging time AA: 1300-1500mAh – 5-6 hours 2300mAh – 9 hours Approx. Charging time AAA: 500mAh – 4 hours 700mAh – 5 hours 800mAh – 6 hours