In this detailed DIY electronics tutorial, Zach from Byte Sized Engineering demonstrates how to construct a custom lithium battery pack using common 18650 cells, providing a practical guide for makers and electronics enthusiasts. The video walks viewers through the entire battery pack creation process, starting with understanding battery cell specifications and connections. He explains how to arrange 18650 cells in series (to achieve desired voltage) and parallel (to increase capacity), using modular battery clips and nickel strips for secure connections. A critical focus is on safety, with the creator emphasizing the potential dangers of battery construction and the importance of careful handling. The tutorial covers technical aspects like spot welding techniques, installing a battery management system (BMS) for cell balancing and protection, and adding insulating layers. Zach also provides a cost analysis, revealing that building a custom battery pack can be approximately 20% cheaper than purchasing a pre-made equivalent, making it an attractive option for those working on multiple projects. The video serves not just as a technical guide, but as an inspirational piece encouraging makers to tackle complex electronics projects with confidence.
