On a hand trailer dolly you do the moving yourself – when you attach the trailer to your dolly, you have to pull or push the handle to move the trailer. On the other hand, an electric boat mover has a motor which powers the wheels.
Controls on a powered boat trailer dolly are usually located on the handle, or you get a remote control to move it forward and backward. The motor is powered by a battery, and it’s connected to the wheel axle with a chain. The whole system allows easy steering and movement, and it can be very useful to people who want to avoid any type of lifting.