VEVOR Electric Trailer Dolly, 3600 lbs Max Trailer Weight 600 lbs Max Tongue Weight, DC 24V 800W Motorized Trailer Dolly with 2 & 1-7/8 Inch Hitch Balls for RV Campers, Cargo & Utility, Boat Trailers

Please follow the instructions in the video to reconnect the positive wire, after which you will be able to charge the device and use it normally. If this response does not resolve your issue, please contact us again for assistance.

We apologize for any confusion this product may have caused. Based on the issue you described, this was caused by the red positive wire inside the tow truck’s junction box not being connected. The positive power line is disconnected by default when the product leaves the factory to ensure safe transportation, prevent short circuits, and avoid battery life degradation or complete failure due to discharge. (This is explained in the user manual.)

It's almost out of power, needs to be charged. It's best to keep it off.

This electric trailer dolly is two-wheel drive, with the motor driving both wheels to prevent slipping.

You can use a battery charger to charge this device.

Yes, users can install 2-5/16 inch ball heads themselves.