I put a nylon strap around all 4 batteries, using the method Karl suggested at the time to connect
all 4 together electrically, which then allows them to be inserted/removed from the aux box as a unit. The drawback of this set up (vs having a single 88ah battery) is that they must be individually disconnected to test them periodically, a troublesome chore. 
Bob
Sent from DAS4X4

On Mar 19, 2013, at 9:14 AM, "kenneth wilford (Van-Again)" <kenwilfy@COMCAST.NET> wrote:

> Bryan, I buy my batteries off of Amazon.com.  If you do a search for
> them (UB12220)
> you can usually find them for a good deal and free shipping if you get them
> from the right place.  I usually only put three in the box as four is a
> super tight fit.
> 
> Ken
>>