4 hours of use after just 45 minutes of charging! A simple, safe, and reliable solution for your daily energy needs. This charger can recharge 4 AA batteries within 4 hours. The 5-year warranty from Duracell, the partial charge indicator, and the automatic shut-off feature to prevent overheating, along with nine safety functions, ensure safe usage and cost savings by eliminating the need for disposable batteries. Suitable for charging AA and AAA batteries. Automatic shut-off. 45 minutes of charging time for up to 4 hours of use. 9 safety features. Dimensions: 118 mm x 72 mm x 27 mm.