SUBLUE Swii Spare Battery Keep your Swii Electronic Kickboard ready for the water with this official quick-swap pack.Conforms to UL 2054 and UL 1642. Specifications Capacity: 6,600 mAh / 98 Wh Weight: 750 g (1.65 lb) Run time: up to 30 min* Charge time: about 3 h Rated charging input: 16.8 V / 3.3 A (charge at 20 °C ± 5 °C) Safety Warnings Risk of fire or burns. Do not open, crush, heat above 65 °C, or incinerate. Actual run time varies with user weight, water temperature, and speed.