CellPack Converter (Lead-acid battery to Lipo)

by ArkanDesign

**Battery Format Converter** is a 3D-printed modular system designed to transform cylindrical lithium-ion cells (18650/21700) into a standardized rectangular battery format. This project bridges the gap between modern Li-ion cell packs and traditional rectangular batteries (such as SLA or LiFePO₄ cases), making it possible to replace, upgrade, or prototype energy storage solutions while keeping compatibility with existing housings and devices. [The Complete Guide To A Battery Management System](https://cmbatteries.com/the-complete-guide-to-a-battery-management-system/) - **Mechanical stability**: Keeps cells firmly aligned and protected. - **Format compatibility**: Matches the dimensions of rectangular batteries commonly used in electronics, UPS, or small vehicles. - **Modularity**: Easily customizable for different series/parallel configurations and voltages. - **Open-source flexibility**: Can be adapted to different cell sizes or case requirements.