Try these guys. Ive been running duel Odessys for about 6 years. Not sure if their set up works with wet cells should though.
I've been thinking about doing the dual battery thing for a while now as well...and I did a bunch of research a while back and I remember reading about the Odysseys having problems lately... I decided to go with the Mean Green setup and Optima yellow tops when I finally pull the trigger on this project. Let me see if I can find some of the links on the subject.
Ok - A quick Google found this - one of the places I saw where people are moving away from the Odysseys.
Here is an excerpt from that page - it looks like they are recommending exactly what I had decided on as well:
"ELECTRICAL SYSTEM ISSUE - CHANGED RECOMMENDATION
We have made a few changes to our Project Jeep in recent days. One of these was the replacement of the Wrangler NW Dual Battery Tray we have previously recommended.
It is an excellent product, but we encountered some problems with the Odyssey PC-925 batteries required by that tray.
The top terminals on those batteries are supposed to take a small amount of rotation. We found that the small amount they quote apparently exceeds what they will really take.
We had one of our Odyssey batteries fail when the top terminal became disconnected from the plates inside the battery and began to rotate freely.
Some research has found that others have encountered similar issues. It seems that the terminals on the Odyssey PC-925MJT and PC-925LMJT batteries may be too weak for this application.
We still recommend the Wrangler NW Battery Manager.
It is the best way to handle the installation of two batteries in your vehicle.
We also recommend their alternators.
We have one in the Project Jeep and it really helped out when we had the problems with the Odyssey batteries.
We now recommend the Mean Green TJ Dual Battery Tray and two Optima Yellow-Top D34/78 Deep Cycle Batteries.
The following review is included for reference and to show the Wrangler NW Dual Battery Manager..."