Gas Cart; Battery Question

[zombiehunter]

I have head/taillights and am installing a 12v cig plug, LED strip lights, LED bars (eventually), and Bluetooth amp with two 4x6 speakers out of my old Benz. I'd like to make sure I have some reserve battery power and was wondering two things:

1) within reason, what's the highest capacity battery/largest form factor (I assume a physically larger battery will hold more AH, correct me if I'm wrong) that will fit in the standard spot without any/much modification

2) where would you put a 2nd battery? I'd wire it in series to keep 12v and will the S/G top them both off in a water finding its own level kind of way?

Thanks for your time!

[Golf cart guy]

A deep cycle battery may work, but I have never done one in a club car before. Group 70 is a small battery to begin with. Problem with going with a bigger battery in a club car is, you run the risk of it rubbing/breaking the air box lid and that will cause running issues. (I see a lot of this where I am)
adding another battery will take some fab work. I'm sure it could be done.

The starter/Generator could have a issue trying to keep 2 batteries at peak.

[crzycartz2016]

You could put a extra battery in the rear where your golf bags use to sit or if inhale a back seat put it in between the bars just get a nice battery box or black plastic one that will hide it like I use to run in race car there not expensive and will be clean looking

[zombiehunter]

Both are good points/ideas thanks a lot!