18650 Fatshark-like Battery Case (Over-engineered) - 8.4V

thingiverse

UPDATE (1 MAY 2017) Uploaded a new version of the top because it was too short to fit correctly. UPDATE (8 DEC 2016) Made several changes to the design after printing and working on the assembly process. Lengthened the overall case to allow more room for wiring. Enlarged the hole for the balance plug and 2.1mm power plug, adding grooves and channels for wiring. Adjusted the snap-on lid for easier insertion into the case. UPDATE Designed this case for using 2 - 18650 batteries with fatshark & skyzone goggles because the stock batteries don't last very long. This is still a work in progress and will post pictures and create an intuitive assembly process as I assemble and test. If you make one, please let me know and post pictures! Here's a list of additional items you will need (or salvage them from your existing goggles): 2 - 18650 Batteries 1 - Large Paper Clip (for lid hinge) 2mm dia. x 22mm length 1 - 1-5S Lipo Battery Voltage Display Indicator Board (available at banggood.com) 1 - DC Power Plug 5.5x2.1mm (90deg angled) (available at banggood.com) Alternate DC Power Plug 5.5x2.1mm (not 90deg) (available on Amazon) Print Settings: Printer Brand: RepRap Rafts: No Supports: Yes Resolution: .2 Infill: 25-50% Notes: 3 layers top & bottom and 3 perimeters Print each of the following: White ABS - case & lid Black ABS - top & bottom Clear PETG - LED tunnels (need 4) Black TPU - test button I designed this so all pieces slide together and snap fit, making assembly a breeze. Assembly: Snap the LED tunnels into place on the top piece. Insert the button. Place the battery test board onto the pegs, paying attention to the orientation of the LED's and button - the top assembly is now complete. Carefully solder the connections (see crude wiring diagram below - pay attention to polarity for the tester and the balance port). Insert the battery assembly and wires into the case. Snap the bottom onto the case. Insert the pin into the case and through the lid. Snap the top assembly onto the case, trapping the pin. Close the lid and enjoy your upgraded battery!