Forum Discussion

RKW's avatar
RKW
Explorer
Nov 01, 2019

How does one charge a dual battery vehicle?

What is the proper method of charging the batteries in a vehicle with dual batteries? Specifically my 2015 Ford SuperDuty Diesel.
  • Since everyone has beat that answer to death. I'll throw this one out:

    Start the engine and let the alternator(s) do its job. Not only will this charge the batteries, but it will circulate the fluids as well.
  • I've always connected my charger to the positive on one battery and the negative to a chassis ground. Been doing it for years with no issues.
  • 18F in Four Corners overnight. Get those batts charged up!
  • pianotuna wrote:
    If you wish to be totally picky, connect the positive clamp on one battery and the negative clamp on the other battery.


    The second cable connected(the negative) should be connected to a bolt on the engine away from the battery(ies) that might be gassing, and cause a battery explosion. Also that is the first cable you disconnect. Chris
  • If you wish to be totally picky, connect the positive clamp on one battery and the negative clamp on the other battery.
  • Hooking up one will take care of both. If you truly want to charge each separately you'd have to disconnect the correct wire. Of course, I'm assuming that.