18650 Powerbank Case Box DIY

cults3d

Here are the updated files on January 2019. I've also added some new features to this project, including a shorter nipple and a new picture. I'll explain why I do this in a minute. The reason I build my own powerbanks is that no commercial product meets my standards for performance or quality. When I design and build my own, I know exactly what I'm getting, and I benefit from the following features: * True dual 2A output, which is capable of handling up to 3A in actual load tests (though phone charging limits it at 2A) * High-quality 18650 cells, identical to those used by Tesla * Discharge cutoff at 3V, allowing for full utilization of battery capacity while following the 80% rule * Ability to recharge powerbanks at 2A, compared to the 0.5A offered by commercial products Here are some videos reviewing my DIY powerbank: Performance test: https://www.youtube.com/watch?v=WTpypuS-RZw Build video: https://www.youtube.com/watch?v=FlWlueCm8sU To accommodate the 18650 batteries, I had to remix this design due to its narrow width. The circuit board/module also required some trimming. To solve this problem, I drew a new design from scratch based on the original creator's dimensions. This design has been tested and fits perfectly with the DIY powerbank module available for purchase below: Single module: https://www.banggood.com/Dual-USB-5V-1A-2_1A-Mobile-Power-Bank-18650-Battery-Charger-PCB-Module-Board-p-1031593.html?p=DG23031123036201501P Three modules (recommended for backup purposes): https://www.banggood.com/3Pcs-Dual-USB-5V-1A-2_1A-Mobile-Power-Bank-18650-Battery-Charger-PCB-Module-Board-p-1133268.html?p=DG23031123036201501P I've also had great results with the Panasonic NCR18650B batteries, which I've used in this project and my drones. These 4-cell batteries are soldered in parallel, providing a total of 4x3400mAh (compared to the usual 4x2500mah found in commercial products). You can purchase these batteries at: https://www.banggood.com/4pcs-NCR18650B-3400mAH-3_7-V-Unprotected-Rechargeable-Lithium-Battery-p-943453.html?p=DG23031123036201501P I'm very pleased with the performance of this board, which is capable of outputting 2A and accepting input at the same rate, allowing for rapid recharging. For my DIY version, I've added a clear acrylic cover to showcase the inner components. This is secured using tiny screws or hot glue. Regarding the LED, I relocated it by de-soldering it and drilling a 5mm hole (slowly!). If you have any success with this design, please let me know - I'd love to hear about it! The 3D printer used for this project is the DIY Creality CR-10: https://www.banggood.com/DIY-Creality-CR-10-3D-Printer-300300400mm-Printing-Size-1_75mm-0_4mm-Nozzle-p-1085645.html?p=DG23031123036201501P