3S 18650 battery case for DJI FPV goggles

thingiverse

Description ========= 3S 18650 battery case for DJI FPV goggles with XT30 and balance charging connectors, plus battery voltage indicator. It uses contact clips to avoid soldering directly to the batteries for less death potential. The case might be suitable for other applications but given that I measured a current of something like 0.7A (i.e. relatively low) at around 12V when powering the goggles, it's not designed for higher current loads and that would necessitate heavier gauge wiring. Somewhat inspired by https://github.com/skaman82/PowerPuck. Parts ==== * 3S battery voltage indicator: https://www.aliexpress.com/item/32848288120.html * M2.5 threaded inserts: https://www.ebay.co.uk/itm/262993790868 * M2.5x20mm countersunk socket screws: https://www.ebay.co.uk/itm/321229110150 * Keystone 228/209 battery contact clips: https://www.modmaker.co.uk/Keystone-228-Battery-Contact-Clips-x-4; https://www.modmaker.co.uk/Keystone-209-Battery-Contact-Clips-x-4 * Balance charging leads/connectors: https://www.ebay.co.uk/itm/331234433262; https://www.ebay.co.uk/itm/230782468199 * XT30 connectors: https://www.ebay.co.uk/itm/191803288686 Notes ===== * I'm not completely happy with the push-button for the charge indicator; epoxying it in place jammed up the switch (perhaps unsurprisingly). Hopefully I'll come up with something better.