Charge your boat cranking battery or other extended trailered batteries while you tow. The Tow-In-Charge charges your 12-volt battery through your vehicle’s 7 prong harness battery feed while powering your other trailer electrical needs. No more dead battery surprises when you get to the boat launch or other destinations.




  • Durable design with high quality 10 gauge wire and components.
  • Simple plug & play installation.


What We Include:


Includes our patented 7-prong harness, 10 foot 10 guage connector wire harness, and 20 foot 10 guage battery terminal wire harness.


Includes a 90 day money back guarantee and 3 year limited warranty.




7 prong harness: 12″L

Connecting wire harness: 10ft

Terminal wire harness: 20ft

Total weight: 3lbs 7 ounces

Tow-In-Charge DC-DC Charger