Summary I made a powerbank for 18650 batteries, 4 of them. Please enjoy, there is a youtube video for the assambley (PART 2). There are three different lids for it, if you wish to replace it after a while of use. Its 2.1A USB pcb-board so you can charge an ipad without problems. You can buy the parts for the powerbank here:
- USB-PCBboard - https://www.banggood.com/Dual-...
- Battery-holder - https://www.banggood.com/DIY-4...
- Battery 4000 mAh - https://www.banggood.com/4PCS-...
- Battery 3000 mAh - http://www.gearbest.com/batter...
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Powerbank DIY 12000-16000 mAh 2.1A
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