You can run most style hump packs in the front box or rear box with the 2013 Radio Tray. Its all about weight distribution. I personally run a 1600 mah hump pack myself in the front box and have it wrapped in foam and still had room. I also ran this battery on the old tray, I just had to space the front box lid with a couple washers to get the clearance I needed and ran the receiver in the rear box.