There is a little bit of room in either side of the cargo compartment behind the moulded carpet wall. Here is where I put my battery:

 

i have rear seats

 

I put mine in the extreme rear passanger corner of the car. I have a full sized battery and its in a Moroso box vented outside.



When we corner weighed my TII (before the battery relocate) it was 45 lbs light in the passanger rear. Hence to new location of my battery.



I have a little dry cell that weighs 11 pounds but all I had to do was leave my door ajar for about 2 hours and it would be dead. It was such a PITA I decided to go back to a regular battery.

 

Oops, I guess my post could have sounded like I was mentioning the bins, especially because of my picture. Actually you will find some room in the far back of the cargo compartment beside the spare well, in front of the tail lights and behind the speaker pillars.

 

I still like the idea of the spare tire well. Screw the spare, that's what AAA plus is for