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Maintains the battery charge on your towed car while it is being flat towed. Works with Demco supplemental braking systems. Includes diode and fuse.
Features:
Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.
Hi, everybody, Andy here with etrailer. Let's take a quick look at this towed vehicle battery charge line kit for your Demco Air Force One and Stay-IN-Play DUO braking system. Now, if you're flat towing a vehicle behind your RV, one of the biggest concerns is making sure that your towed vehicle's battery doesn't drain while you're going down the road. That's exactly what this battery charge wire kit is designed to prevent. Now, this features a built-in LED indicator. So, instead of wondering whether your charging system is actually working, the LED is going to light up whenever a complete electrical circuit is established between the motorhome and the towed vehicle.
So, it's gonna give you an instant visual confirmation that the battery is receiving a charge while you're towing. That simple feature is going to take away a lot of guesswork. Without it, you might not realize there's a connection issue until your towed vehicle's battery is dead at your destination. So, with that LED, you're going to be able to quickly verify everything is connected and functioning before you hit the road. This also includes diode protection, which is going to prevent electrical current from flowing backwards into your vehicle's electrical system.
And then the integrated fuse protection to help protect the wiring and electrical components from damage. And this includes a 10-amp fuse, as you can hopefully see there. So, those built-in safeguards are gonna make this a more complete solution than just a basic charge wire installation. Overall, this battery charge wire kit is going to provide a direct charging connection from your RV to your tow vehicle's battery while you're traveling. So, its job is going to be to keep your battery charge in your vehicle.
Again, that's gonna help reduce the risk of battery drain with the added LED indicator, which is a great feature. And it's gonna be a whole lot easier for you to confirm that your charging system is working as intended while you're traveling. If you would like some help with getting this installed on this product page, underneath the Photos section, we have a link that will take you to our Installer Locator. Click that link, answer the questions that it has for you, and that locator will find an installer in your area that etrailer has partnered with to get this installed for you. Well, again, my name's Andy.
Thank you for joining me.
Customer Satisfaction Score:
98% were satisfied with this product
2% of customers were not satisfied
Ratings & Reviews
James
3/22/2026
After a year using solved my problem with my battery going dead using a breaking system. Worth every penny!
Lazer S.
6/16/2026
Glad we could help, Scott! What vehicle are you flat towing? And where all have you taken it?
David W.
2/8/2026
Just fine! Been out west and down east. Absolutely no worries about disconnecting and being able to start the jeep.
Kate F.
2/9/2026
Carlos
12/25/2025
After a year the product continues to perform without issues. Have not experienced any charging issues while towing.
Lazer S.
12/26/2025
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Mike L.
4/23/2026
That's a cool idea Brian, I like that!!!