Do batteries charge while driving?

cdoc83 wrote:
Hey all, I'm just getting into camping with a travel trailer and was wondering if the batteries "automatically" charge while attached to the tow vehicle?

I am sorry to say, that the other responders are very being very optimistic !

At best, you can expect that the trailer batteries is NOT discharge any further. They certainly will not re-charge if depleted !

Please read this DC-DC battery charger