Dual Battery Setup

March 28, 2008

Alright got a battery tray and the cables, but i was wondering if i connect the two together + to + and - to -. that is in Parralell, do the CCA and CA's combine? or does it still just use the power connected from the batter with the cables going to the starter?

I already know that i just connect every accesory to my "accesory" battery but then when they are both connected the truck will charge both right?

And 1 more question i am looking at the Warn battery isolator, im thinking that would be kinda nice to have but i dont see how it connects it looks like it has studs but look too small for battery connections.....

i posted this here because nobody really looks at any other part of the forum so i could get a answer

alaska511 · March 28, 2008

Alright got a battery tray and the cables, but i was wondering if i connect the two together + to + and - to -. that is in Parralell, do the CCA and CA's combine? or does it still just use the power connected from the batter with the cables going to the starter?

I already know that i just connect every accesory to my "accesory" battery but then when they are both connected the truck will charge both right?

And 1 more question i am looking at the Warn battery isolator, im thinking that would be kinda nice to have but i dont see how it connects it looks like it has studs but look too small for battery connections.....

i posted this here because nobody really looks at any other part of the forum so i could get a answer

Why are you thinking about an isolator? You said you were hooking them parallel. An isolator is used charge a battery for a seperate or "isolated" purpose like an RV house battery, I use an isolator on my service trucks to charge a second battery that starts my air compressors. The small terminals on an isolator are for charging circuits, not the calbes. If you are using it just for starting, and lighting on your truck, then cable them parallel and run the positive off of one to the starter, and the negative off the other to the block. You will get the full CA capability of the pair that way. Match the batteries if you can, one may drain the other.