This battery tray has been designed to allow for standard 2S Lipo batteries to be used in combination with the Eye One Xtreme. As an added bonus, it strengthens the stock EOX frame and improves the flight characteristics by increasing the stiffness of the motor arms. This version contains a back-plate to which a receiver or lipo alarm can be attached (in my case, an Orange r615x). What else do you need? -Velcro. -EOX male to JST female adapter for standard 2S lipo batteries (rc-connectors.com). -a 3D printer (or go to https://www.3dhubs.com/ for a 3D printer near you). That's it ;) Moment of Inspiration. Cinema 4D