Assuming these are 12V batteries and you are operating a 12V system, you
must connect the batteries in parallel, all the positive terminals
connected together and all the negatives together.
  A charger designed for 12V can then be connected to any of the batteries.

Larry A.

On Mon, Feb 9, 2015 at 7:06 AM, Dennis Jowell <dennisjowell@gmail.com>
wrote:

> Tim,
> Which way? positive of #1 and then negative #3?
>
> Dennis Jowell
> Scotch Hollow Farm
> Newbury, Vermont
>
>
> > On Feb 9, 2015, at 7:03 AM, Tim Whynot <timwhy@MSN.COM> wrote:
> >
> > On Sun, 8 Feb 2015 10:15:07 -0800, Rocket J Squirrel
> > <camping.elliott@GMAIL.COM> wrote:
> >
> >> "Maybe it doesn't even matter."
> >>
> >> If they are in fact wired in parallel, then nope, it doesn't matter.
> >>
> >> --
> >> Jack "Rocket j Squirrel" Elliott
> >> 1984 Westfalia, auto trans,
> >> Bend, Ore.
> >>
> >>> On 02/08/2015 08:37 AM, Dennis Jowell wrote:
> >>> I'm going to install 3 -UB 122230 -12V 22Ah AGM Sealed Deep Cycle
> > Batteries in my Westy. Installed in parallel. My question is how to
> > charged them with my on board charger? Do I put positive on #1 battery
> and
> > then put negative on #3 battery or just use #1 battery to charge all of
> > them together.? Maybe it doesn't even matter.
> >>> (1988 GL Westy full camper)
> >>>
> >>> Dennis
> >>>
> >>> Dennis Jowell
> >>> Scotch Hollow Farm
> >>> Newbury, Vermont
> >>>
> >
> > Dennis, I would suggest you wire them as you stated. I had my aux
> > batteries wired the other way and it killed a brand new battery. When I
> > took the battery back to be tested it had lost half of its capacity, tho
> > it would charge. One bad battery in parallel can bring the others down
> > with
> > it.
>