Idea from here: http://fishpepper.de/2016/09/04/fatshark-skyzone-fpv-goggle-diy-battery-pack-using-18650-cells/

Housing to fit the Skyzone googles.

Take long cables, so you can wear the housing on the back side of the head.

It also fits in the Skyzone bag.

Printed in 0,09mm

cap should fit without something else if your printer is well calibrated,

otherwise use some glue.

You can take a jst xh for the balancer but a servo plug also works.