The Duracell Hi-Speed Charger is a simple, safe, and reliable solution for keeping your rechargeable batteries powered up. It offers a fast charging time, with AA batteries reaching approximately 90% charge in 4 hours and AAA batteries reaching approximately 80% charge in the same timeframe when using Duracell 1300 mAh AA NiMH and 750 mAh AAA NiMH batteries respectively. The charger features a partial charge indication and an auto shut-off function to prevent overheating, along with 9 safety features for worry-free charging. It comes with Duracell's 5-year guarantee, ensuring long-lasting power and performance. This charger is compatible with both AA and AAA rechargeable batteries and includes 2 AA 1300 mAh and 2 AAA 750 mAh Duracell rechargeable batteries. LEDs indicate when batteries can be used, typically providing up to 4 hours of power for AA batteries.