The Duracell Ion Speed 1000 NiMH Battery Charger will recharge your batteries in 4-8 hours with 1000 mW of charging power. It recharges any AA and AAA NiMH batteries from any brand. Status Indicator: You can recharge 2 or 4 batteries at a time and, with an LED Charge Status Indicator, you’ll know when charging is complete. Auto Shutoff: It also features an Auto Shutoff so you won’t use any unnecessary electricity. Up to guaranteed to last 10 years. Additional Features Accessory: Charger 10 Years: Plus, the Duracell Rechargeable Pre-Charged NiMH Batteries are Counts: 6 AA and 2 AAA