I tested all three immediately. I have two devices connected via USB and two of them via an outlet. Two of them worked perfectly. The third one charged first but stopped after 5 minutes. I shook it and it started loading again. But after 5 minutes it stopped again. I tried unplugging and plugging it back in and it started charging again. But after about 5 minutes it stopped again. Just to confirm; it didn't stop because the devices were fully charged. It just stopped loading. It would be nice if I could just return the defective one, but since I can't I'll just live with two that work fine.
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