I've run 2.0 AWG wire from my battery to the rear storage area (behind the rear seats

[4x4junkie]

Thanks for your input about the battery box.

On the WranglerForum someone suggested this one which does appear to be sealed but it has a vent tube...

https://m.summitracing.com/parts/mor-74051

That looks like a specialty box made for a race application.

Boxes like these are more like what I was thinking (a lot less $$$ too):
https://www.amazon.com/Camco-55373-Large-Battery-Box/dp/B00EOX2OKS
https://www.amazon.com/NOCO-HM327BKS-Snap-Top-Automotive-Batteries/dp/B004W5SG6Y

 

[rayra]

There's a lot of unfounded fear generated about 'venting'. It's only a concern when you've got a serious overcharging situation or a shorted cell in the battery. In normal operation it's next to nothing and in either case, your vehicle isn't going to trap hydrogen. Only in a small tightly sealed volume can you get a dangerous gas mix / combustion hazard. You aren't going up like the Hindenberg. (or is that too old a reference for Millenials?)

 

[MagicMtnDan]

Thanks for that!

It's "Hindenburg" by the way.

"The humanity!"