HobbyKing Desert Fox Battery Clip
thingiverse
The battery holder on the Desert fox did not allow my hard case battery pack to fit in and be strapped in easily. Print two of these, and just push down into the recess and it should snap into place and stay put. Push the walls of the battery box apart to free the clip. Battery installed was a Zippy Flightmax 5200mAH 2S2P with a width of 46mm and a height of 25mm https://hobbyking.com/en_us/zippy-flightmax-5200mah-2s2p-30c-hardcase-pack-roar-approved-de.html Printed this in PETG, seems to have the right combination of spring and strength.
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