Please be careful when working with lithium batteries/cells!
If u are interested in how to make your own RC battery pack from old power drill batteries, then this tutorial is right for u. This video tutorial explains how to wire cells together and connect the balance charger. Cells what I am using is a Samsung 18650 cell.
At the end of this video, I 3D printed hard case for a battery pack, .stl files is free.


All steps work with Li-Ion cells.

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Free .stl files for battery pack: https://cults3d.com/en/3d-model/gadge...
My other projects: http://youtube.com/c/letsprintyt?sub_...