4S 18650 FPV battery pack

thingiverse

I couldn't find any (good) 18650 battery pack's for the DIY 4S li-ion pack that I wanted to make for my FPV drone for flying long range. I have used models for TPU battery protectors/caps for a 4S li-ion 21700 pack that I build before, but although the design was pretty good, I wanted to make some improvements, thats why I designed my own model in Inventor. The 18650 batteries fit nicely in the model, but you still need to use hot glue to glue to bind the cells together so you can be sure they won't break the electrical circuit in a crash. I connected the batteries using tin strips, but i am pretty sure that you can also use 12 AWG wire in my design, since I made the cut for the wire/tin strip pretty deep. I also left 2 gaps in between the batteries in the bottom cap for the 2 balance leads that need to go between the battery connections. Warning! making your own 4S battery pack is not without risks, since you could burn down your house pretty easily if you make a short in the electrical circuit. I advise following a youtube tutorial if you want to make a diy 4S pack, I followed this tutorial: https://www.youtube.com/watch?v=6QpmP6JV4jk&t=751s&ab_channel=KAREKINFPV I am not liable for any damages that may ensue after you burned down your house or something similar when you try making one yourself, so be careful of the risks and continue on your own risk!