The total time on the water depends on a number of factors, but primarily the speed at which the board is operated. When sharing with friends, we’ve seen Kymera Body Boards providing two hours of fun on a single charge! Riding the board at full speed provides 25 minutes of run time, followed by 30-35 minutes of reserve power to allow you to return safely to shore. The switch from full speed to reserve power is automatic when the battery power level drops below a preset level.