The Duracell Ion Speed 4000 NiMH battery charger offers amazingly fast charge times of 1-2.5 hours* with 4000 mW** of charging power. It recharges any rechargeable AA and AAA NiMH battery from any brand. You can recharge 2 or 4 batteries at a time and, with the LED charge status indicator, you’ll know when charging is complete. It also features an auto shutoff so you won’t use any unnecessary electricity. It even has a bad-battery indicator along with 9 smart safety features.

Safety Features:

• Over voltage protection
• Low voltage protection
• Reverse polarity protection
• Short circuit protection
• Primary cell protection
• Over temperature protection
• Low temperature protection
• Charge Termination (Overcharge)
• Safety timer

*To approx. 90% of full charge when using 1300mAh up to 2500mAh 2xAA NiMH Batteries (included). **Based on charging AA batteries. ***Or 400 recharges, whichever comes first.