Rechargeable rowing machines

From battery

— the trainer is powered by removable/rechargeable batteries. The main advantage is complete battery life, the device can be installed where necessary, without worrying about the reachability of the outlet. But at the same time, the power of the batteries is limited, they are only suitable for simulators in which power is required only for the computer. But even for such devices, the battery needs to be changed or charged from time to time.