USB Power Bank 4 18650 Cell
thingiverse
USB Power back using 4 18650 lithium cells. This is my first design and it may have different revisions in the future. The current design allows for a small amount of spacing on the top and bottom of the 18650 batteries for soldering the wires. Please note, there is no extra space for any wrapping on the batteries, the batteries need to only have its sleeve on it. To close the box, apply a small amount of super glue to the edge of the lid. I may create a newer version with screw holes in the future. If you have any suggestions please put them in the comments. USB Circuit board can be purchased from Amazon https://www.amazon.com/MakerFocus-Charging-Overcharge-Overdischarge-Protection/dp/B07M836ZV3/ref=sr_1_1?keywords=usb+power+bank+circuit+board&qid=1567902711&s=gateway&sr=8-1
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