Battery relocation
 

Has anyone relocated the battery into the spare wheel area?

Interesting concept. Shouldn't be that hard. Its not that much farther back to that area. What's the plan? Splice / solder two cable extensions or buy all new cable?
A battery hold-down bracket could be mounted to the bottom of the tub. Your biggest hardship would be lowering the tub to monitor the cable connections.
A sealed AGM battery would be in order because of the angle of the unit when lowering the tub. Weight & height would be about the same as a spare tire. However, if using a Top-Post model, make sure its impossible for the post to make contact with the frame or gas tank with some type of battery cover.

I think it would be harder to get to and harder to put a charger on if needed. Unless you have a lift, of course.
Don't think I would want it right under the gas tank..

It is rare that the battery would fail violently, but you would have a killing machine if it ignited the gas tank. How about the jack compartment to help balance the weight in the car.

Purely curiosity here, what is your reason for wanting to put the battery back there? (Makes sense for drag racing, though.)

FWIW, I did what doorgunner mentioned. I moved my battery to the jack compartment for better L/R weight distribution. (However, the stock location is probably better if you have converted your car to RHD.)

The reason for moving the battery is simply to get extra room, and contemplating dropping a sub behind the drivers seat. Plenty of trucks have a battery tray hanging from the chassis so why not!!! As for. charging / testing an anderson plug tucked behind the bumper would be all that's needed.. It's Winter here and just thinking of something to do.

Here's a way to get a bunch of room- without a lot of work-

I used two 6 volt batteries in series- EXACTLY the same specs as a 12V- CCA and reserve-

As far as jump starting- I added a positive starter cable terminal- under the hood - right to the starter-a bunch of newer cars use this- got mine from the junkyard-

https://cimg5.ibsrv.net/gimg/www.cor...1f82da23d4.jpg

It has a nifty cover that protects it
https://cimg5.ibsrv.net/gimg/www.cor...962ae79048.jpg