Power your dolly with your trailer’s battery! Force Dolly's battery running low? Need a backup power source when you're on the go? Tether entirely off of your trailer battery with the 80" cable! This extended cable is perfect for outdoor enthusiasts who may not have access to a wall outlet to charge the dolly’s onboard battery. Leave the battery behind and run it completely on your trailer's battery to reduce the Force dolly's weight for transport. Details: Allows you to power the dolly with your trailer's battery. Compatible with our Force 5K and 10K trailer dollies. Intended for use with Sealed Lead-Acid batteries. May not function with some Lithium-Ion batteries. Package includes: 80” Cable 2 x Zip Ties Installation: Install onto your trailer’s battery terminals (red to positive, black to negative). Force models: Plug the Anderson cable into the dolly. The digital voltmeter on the module will illuminate. You’re ready to park!