DIY Powerbank MK1 "GRENADE"

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

 

🔋 2x 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:
🔹 4x 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 4 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! 🚀

Boost Me