Most of my bikes have racks & fenders. The box is a plastic Spin Doctor tool box that came with bike tools that now hang on the wall by my workbench. It is held in place on the rack with 2 bungee cords. I used 16 gauge wire from the auto parts store with all connections soldered & taped for now (later I will coat with liquid tape). I mounted a push type on/off switch on the side of the box. The wires to the headlight & front strobe are long enough to reach the stem with a bit extra & they connect there with spade type electrical connectors, I also taped them to the top tube at both ends. The headlight bracket attaches to the bar with 2 stainless steel hose clamps & the front xenon flasher is mounted on the reflector bracket which was already there. In order to transfer to another bike, I would unplug from the front headlight & move the box to the backup bike. I bought another of the 55watt lights since they were so cheap & plan to have it mounted on the backup bike so it would only have the headlight plus the xenon flasher on the box along with any blinkie I care to add. The battery measures 3 3/16 deep X 5 3/8 wide X 6 3/8 tall so that leaves most of the box for cargo if I need to carry anything. To charge, I just lean the bike against my workbench, open the box & attach my automobile charger to the battery terminals. This is a conventional lead/acid battery so if I catch a flat, I will have to remove the box before I lay my bike down to remove the rear wheel. I ran a piece of plastic hose from the vent tube through the side of the box. Rode it again today & had to demonstrate it to one of our attorneys who mountain bikes a lot. He was fascinated by the whole concept of a do it yourself light system that turned out so well. I will try to get a picture up this weekend. Don