Review : ZMI 20,000 mAh USB Battery Pack/USB Hub with Power Delivery – My new favorite USB Battery Bank

I have a problem, I love USB battery packs and my collection keeps growing, it is getting so bad that I am running out of space in my backpack. Many of my USB battery packs have a similar set of features, the ZMI 20,000 mAh Battery Pack is very different as it not only puts out enough power to charge my PixelBook at full speed but it pulls double duty by acting as a USB 2.0 hub at the same time. 

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