DIY 600A Car Jump Starter + 100W Power Bank | 15x21700 180A Cells + 3S BMS + 3D Printed Box

A next-level DIY power build — this 600A car jump starter + 100W power bank is powered by 21700 180A high-discharge cells, enclosed in a custom 3D-printed box, and equipped with EC5E connector and a smart relay clamp for safe, instant ignition. ⚙️ Main Components: - 15x 21700 5000mAh cells (180A burst, 125A continuous) - 3S 600A Li-ion BMS protection board - 100W fast charge module (PD/QC/Type-C) - EC5E power connector (male type, high current) - Smart relay clamp with display (quick connection & voltage monitor) - Custom 3D printed enclosure : https://makerworld.com/en/models/1935232 💡 Features: - 600A burst power — starts cars effortlessly - Dual use: jump starter + 100W power bank - Smart relay protection, short-circuit & reverse-polarity safe - USB-C PD 100W fast charging output - Compact 3D printed shell, lightweight & strong ⚡ Perfect for DIY makers who love combining engineering, design, and real-world utility in one project. DIY jump starter, 600A jump starter, EC5 connector, smart relay clamp, 21700 180A, diy power bank, 3s bms, car booster, fast charge 100w, portable power station, 3d printed box, maker diy, high discharge battery, lithium pack, pd100w charger, 3d printing #DIY #JumpStarter #PowerBank #21700Cells #180A #600A #EC5 #SmartClamp #3DPrinting #BatteryPack #Maker #Electronics