🔋 DIY 20000mAh Power Bank – Build Your Own High-Capacity Backup!
🔋 DIY 20000mAh Power Bank – Build Your Own High-Capacity Backup! Do you often find your phone dying during travel or power outages? Why not build your own 20000mAh power bank at home? It's cost-effective, fun, and perfect for electronics lovers. 🛠️ What You’ll Need: 6x 18650 Li-ion batteries (each ~3400mAh) BMS (Battery Management System) 3S or 4S protection board TP4056 charging module or power bank charging module with 5V output A small plastic or metal enclosure Wires, soldering iron, and basic tools ⚙️ How to Make It: Test all batteries using a multimeter for voltage (ideal: 3.7V–4.2V). Connect batteries in parallel or series+parallel (for voltage and capacity). Attach the BMS to manage charging/discharging safely. Connect the charging module to the output of BMS. Place everything inside the enclosure , ensuring it's insulated and safe. Add USB output ports if needed, and charge it fully before first use. 💡 Tips: Use...