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Its generally not recommended to directly connect multiple batteries of different styles, different ages, and/or different sizes. The batteries will not charge and discharge the same and it could cause undesired effects or reduce the lifespan of the batteries. Additionally, LiFePO4 batteries...

If I were you, my next step would be to get someone with a Trailhunter and hook up a scope to the vehicle side of the connector to see if the pins are signals or just high/low 12v. I might be able to help with this, in a few months. Good luck!

I’m seeing the “CAN-“ and “CAN+” pins… those are CAN connections into the LED bar itself? I’m guessing it will not operate without the proper communication with the network, unfortunately.

It sounds like these are just DC-DC chargers specifically designed for integration with the portable power pack. I'm not familiar with these specifically, but I have integrated DC-DC chargers into multiple vehicles. Typically, the DC-DC charger activates in one of these ways: It looks at the...

@brewrunner, do you mind measuring the length of the box? I’m currently doing research and plan to buy a 4Runner, and your post is making me wonder if a drawer box I made for a different vehicle would fit.

I've read that the jump start posts are not rated for the kind of current that a winch would pull. Edit: If we assume a 15 foot run between the winch and the battery (30 feet total), the wires should be 2/0 or 4/0 AWG to sustain 400A. I'm not sure what the battery-to-frame connection looks...