The charger is suitable for the 20 V and 2x20 V batteries from Dual Power. You can charge both the new generation batteries and the older generation ones, allowing you to continue using your old Dual Power batteries. The 20 V battery takes approximately 40 minutes to charge, while the 2x20 V battery requires about 2 to 2.5 hours. Once the battery is fully charged, the indicator light turns green, and you can continue working. Discover our new generation of Dual Power batteries: a 20 V and 2x20 V Li-Ion battery with even higher performance. Rated voltage min: 200, rated voltage max: 240, rated frequency min: 50, rated frequency max: 60, maximum rated power: 100, charger rated current: 4, overload protection: No, battery charge status indicator: Yes, battery status indicator: No, 1-hour charger: No, general warranty: 36, number of inputs: 1, number of outputs: 1.