Dual Batteries

[atregent]

I'm looking to install a second battery somwhere in my X and was wondering if anyone else had done so.

We go camping a bit, so I'm looking at powering a fridge and some other bits and pieces. Admittedly, I haven't had too much of a poke around the back yet, but I was thinking about where the subwoofer goes as a potential location. There also seems to be a bit of space under the cargo area floor, but haven't pulled that apart yet to confirm.

I'd be getting an AGM battery, so it doesn't need to be vented and can be mounted on any side, which should open up some more options.