18650 USB-C power bank

DIY 18650 Power Bank – USB-C Battery Pack | 3MF + F3D +STEP Compact rechargeable power bank designed for 3x 18650 Li-ion cells. This DIY battery pack combines a clean modern design with easy 3D printing and simple assembly. Perfect for makers, electronics enthusiasts, and anyone wanting to recycle 18650 cells into a functional portable charger. Features : Compact and clean design USB-A output USB-C charging Designed for 3x 18650 cells Easy assembly Visible battery layout Screw-mounted enclosure Real tested prototype Included Files : STEP file F3D source file 3MF file Required Material : 3x 18650 Li-ion cells 1x USB-C power bank module : https://tinyurl.com/3wkxx7r9 (Aliexpress) 1x 3-slot 18650 battery holder : https://tinyurl.com/sjs9azwd (Aliexpress) 4xM3 screws Printing Recommendations Layer height: 0.2 mm PLA / PETG recommended 15–20% infill Simple soldering required. Safety Notice Use only identical 18650 cells with the same charge level. Always use quality charging modules and assemble electronics carefully. This project is intended for users familiar with basic electronics and Li-ion battery safety. Disclaimer : The power bank shown in the photos is a real assembled and functional prototype. I cannot be held responsible for any damage, injury, battery failure, fire, or electronic malfunction resulting from the assembly, misuse, or improper handling of this project. Use Li-ion batteries at your own risk.