R
Just got my new 700 deluxe. Installed a viper 4500 LB. winch and with that kind of load needed to install an extra battery. There is not an easy place to install an extra battery. If you install the battery under the drivers seat a much more complicated battery box would be required (why Honda does not have something there from the factory is beyond me!). I chose under the hood for the spare battery. The attached photos show the installation. After measuring the area I wanted to use the largest battery I could install. I installed a 30AH battery that I found at a Batteries Plus store. Installed a True battery isolator. All wired to the original battery to allow for charging. Grounding is through the frame. The battery tray is fabricated from 14 gauge SS. The back side is held in place cutting 2 slots in the SS and using hose clamps on the round frame member. Drill and tap the square tubing in front. Battery isolator mounted using double back adhesive foam tape. Battery hold down is an off the shelf rubber strap with a nylon spacer block to anchor the battery.