My favorite modification to our Imagine was previously installed on our old trailer. I moved it over as soon as we took delivery of our Imagine. It is a beefed up battery box. It is large enough to hold 3 batteries for dry camping. It is lockable to deter battery theft while sitting in storage and I wired in an additional battery cutoff switch to cut power to the power tongue jack. It mounts to top of the A frame with self taping bolts.I purchased the box from eTrailer and it is a Power Armour made by Tork Lift.