This is a battery cage that holds a 2200 mah 3s Lipo Battery. It is designed for the DJI Phantom but will work with the F450, F550 etc
The cage slots onto the d3wey Custom FPV Undertray and is held in place with velcro strapping.
It fits the stock lipo but also third party batts that are designed to fit in the Phantom.
Internal Dimensions are:
Length: 103mm (to the rounded edge of the Lipo). There is a sprung edge so it will accept upto 105mm at a push.
If you need a larger cage one is available for the Turnigy Nanotech 2250mah