I Built a 2-in-1 Car Jump Starter & Power Bank (DIY)

#ErCanEverything #EVE #Batteries 🔥In this video, I build a DIY car jump starter using a 4S2P Li-Ion battery configuration based on EVE 40PL cells and a 100A BMS. 🔋To make the device even more versatile, I also integrate a 2S–6S 45W bidirectional charging module, allowing the jump starter to work as a power bank as well. This means it can both deliver power and be charged efficiently, making it useful beyond emergency engine starts. ⚠️ Important Warning: Before starting the engine, you must pre-charge the car battery for about 2 minutes using the jump starter. Failing to do so may damage the BMS, as it is limited to 100A and sudden high current draw during engine start can exceed this limit. 📌You can find featured products here: 🖨️STL File: https://cults3d.com/en/3d-model/tool/... 🔸SEQURE SQ-SW3 Spot Welder: https://s.click.aliexpress.com/e/_Exk... 🔸FNIRSI HRM-10 Battery Tester: https://s.click.aliexpress.com/e/_ooR... 🔸2S - 6S 45W Bidirectional charging module with Display: https://s.click.aliexpress.com/e/_c4W... 🔸4S 100A BMS: https://s.click.aliexpress.com/e/_c2y... 🔸600A Clamp Meter GVDA GD168B: https://s.click.aliexpress.com/e/_DeE... 🔸Digital Multimeter UNI-T UT89XD: https://s.click.aliexpress.com/e/_EJN... 🔸100W GaN Charger: https://s.click.aliexpress.com/e/_c2u... 🔸Fnirsi FNB58 USB Tester: https://s.click.aliexpress.com/e/_c40... 🔸Jump Starter Alligator Clip: https://s.click.aliexpress.com/e/_c35... 🔸EC5 Male Connector https://s.click.aliexpress.com/e/_c3W... 🔸Copper Sheet 30mm x 0.15mm: https://s.click.aliexpress.com/e/_c3Z... 🔸Green Insulation Gasket: https://s.click.aliexpress.com/e/_ol6... 🔸21700 Battery Positive Insulation Gasket: https://s.click.aliexpress.com/e/_oo2... 🔸2P Nickel Plated Steel Strip: https://s.click.aliexpress.com/e/_oDu... 🔸Fiberglass Wrapping Tape: https://s.click.aliexpress.com/e/_ok0... 🔸Double Sided Tape: https://s.click.aliexpress.com/e/_oEs... 🔸EVA Foam Sponge Tape https://s.click.aliexpress.com/e/_oCI... 🔸AMTECH Soldering Flux: https://s.click.aliexpress.com/e/_oFG... 🔸Silicone Wire 20AWG: https://s.click.aliexpress.com/e/_c4q...