How much weight can the tongue carry?

Is the concern about having a lead acid battery in the storage compartment just about the out gassing when it charges?

It is possible, but not using a traditional lead/acid battery. The best and newest AGM batteries internally recombine the charging gasses back with the electrolyte. Cruising sailors will sometimes create large battery banks by using multiple AGM batteries in the bilge space inside the boat. I 've never done it myself, but I know some who have. For me, pulling up the bilge boards and seeing all those batteries wired together just inches under your feet was a little unsettling. The upside is they can last 10 years if you take care of them, they won't leak acid, and they charge really fast.

Originally posted by hogone i think it was you charlie that recently mentioned 6v golf batteries from sams for $85-$90 a piece.  i just looked them up, are these good enough quality/just as good as the rest?  just curious.  hogone

I can't say yea or nay on Sam's quality. Trojan T105s are the gold standard so it becomes a trade off between unknown quality or fewer bucks and known quality for more bucks. One thought is to check at your local golf course. They have an interest in quality vs cost.

I think physical space may be more limiting than weight. With my 172 I had two 6V golf cart batteries, two propane tanks and the spare tire on the tongue plus a WDH with no observed problems. With 4 batteries I assume they will be GC2 golfers, but they take space if you adequately support and secure them. Consider the options of heavy duty jumper cables recharging from your TV or carrying two extra batteries in your TV and swapping. All easier than a generator and gas is you don't need the air conditioner.