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Hi,I will send you .stlFor some reason I had to cut PCB a bit to get it in. I will make some modifications to model soon so that PCB fits without hand mods.
Hello,I have used also large phone battery cells in diy power bank...got them for free. :) If you want to play safe, you can leave protection circuitry to battery. I have charged cells roughly to same voltage, and then soldered them parallel.PCB is general one from 2$ 10400mAh ebay diy bank.Covers designed with Autodesk Fusion 360 (free) and then 3D printed.
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