Two banks of two batteries - different size - no-no?

Hi,

If the batteries were all new then only method #3 on this page would allow for perfect balance of the system.

How to connect multiple 12 volt batteries

Since that is not true, I would use two simple Napa switch on each bank so that you can select either bank, or both. That allows the flexibility to charge one bank while using the other.

rjsurfer wrote:
I'm having a hard time understanding the correct way to wire up two banks of batteries. In my case I have 2 four year old T105's and I'm adding two more.

It looks like from what I have read I can avoid using a selector switch and join them all together for better battery life.

Is there a diagram that someone could point me to so I can see exactly
hows its done. At my age a picture is worth 2 million words :-)

Thanks

Ron W.