Fatshark 18650 Case with Regulator

thingiverse

I increased the size of the case to fit in a budget-friendly step-up regulator, ensuring that the pack always delivers a pre-defined voltage (8.4v) as set by me. The servo plug is used for charging, since my charger requires both discharge and balance leads to be connected. Be aware that you shouldn't connect the main discharge lead directly into a charger, as it's already linked to the step-up regulator output. DC Boost Converter: https://www.banggood.com/5X-DC-Boost-Converter-2A-Power-Supply-Module-2V-24V-To-5V-28V-Adjustable-Regulator-Board-p-1181876.html?p=DU271811622582015018 LED indicator board (2S version): https://www.banggood.com/1-5S-Lipo-Battery-Voltage-Display-Indicator-Board-p-1073721.html?p=DU271811622582015018 5.5x2.1 right angle DC jack: https://www.banggood.com/DC-Tip-Power-Plug-Jack-Connector-Dual-5_5-x-2_1mm-Male-Right-Angle-Cord-Cable-p-1161332.html?p=DU271811622582015018 In addition, you'll need 4x 20mm M3 bolts, a 2s balance lead, standard servo lead, and hot glue. UPDATE: If you purchase the low-cost DC boost converters, make sure to buy them in a multipack. The first one I used failed about ten minutes after assembly due to a malfunctioning boost regulator IC. Replacing it with another module has so far kept the second one running smoothly, perhaps just bad luck with the initial unit.