DIY mini Powerbank MK1 "LINES"

Check out the full collection here: https://makerworld.com/it/collections/21153900-diy-powerbank    Hi Makers! 👋 Welcome to the ultimate DIY 3D Printed Powerbank project! This modular design lets you build a powerful, customizable portable charger for under $25/€20. The core structure holds the electronics, while the outer shell can be swapped instantly to match your style. 📺 Watch the Full Assembly Video Guide:   💰 Estimated Cost Around €20 / $25 (excluding filament & batteries). 🛠️ Skills Required Soldering: Basic level (connecting wires to pads). 📋 Bill of Materials (BOM) ⚡ Charging Board (USB-C + USB-A): Choose one link: 🔗 Link 1: https://it.aliexpress.com/item/1005005056102340.html 🔗 Link 2: https://it.aliexpress.com/item/1005005023981835.html 🔗 Link 3: https://it.aliexpress.com/item/1005009685351363.html   🔋 1x Dual 18650 Battery Holders: Choose one link: 🔗 Link 1: https://it.aliexpress.com/item/1005008870018574.html 🔗 Link 2: https://it.aliexpress.com/item/1005007822476685.html 🔗 Link 3: https://it.aliexpress.com/item/1005005301516019.html   Other Components: 🔹 2x 18650 Batteries (Standard flat top - IMPORTANT: Do NOT use button top batteries!) 🔹 8x Heat Set Inserts M3x5x4 🔹 8x Countersunk Screws M3x6 🔹 7x Countersunk Screws M2.5x8 🔹 Electrical Wire (choice of gauge) 🔹 Solder ⚠️ IMPORTANT SAFETY NOTES ⚠️ WIRING CONFIGURATION: Batteries MUST be connected in PARALLEL. Connect all POSITIVE (+) poles together and all NEGATIVE (-) poles together. DO NOT CONNECT IN SERIES! DO NOT REVERSE POLARITY! Doing so will damage the board instantly and may cause fire or injury. BATTERY ORIENTATION: Insert all 2 batteries in the SAME DIRECTION. Always verify the actual + and - on the battery itself. Do not trust the markings on the plastic battery holders, as they may be misleading for this parallel setup.   Happy printing! 🚀