DIY 65W 33140/C33 Powerbank Case

Presenting a powerful portable power source capable of delivering 65W and featuring a capacity of approximately 200 Wh, built using modern LiFePO₄ 33140x4 15Ah cells. This tutorial is intended for people who already have experience assembling similar devices. The internet is full of examples of how to connect batteries in series and how to connect them to a BMS with a balancer.

This power bank weighs about one and a half kilograms, which doesn't make it compact. However, it's indispensable in