I think I have the same small USB/battery light. It provides excellent lighting - when powered by the built-in battery or when the eDGe is on AC. Before Dingo, I noticed a 1 Hz flicker, but now it's worse at about 2 Hz. In both cases, it was unuseable due to flicker. I'm going to submit a Tech Support ticket about this now, as it seems to some extent to be a software issue, not hardware (could be it has to do with the OS polling the USB ports for plugged in devices).
Meanwhile, use it in battery mode. LEDs are extremely energy efficient, and it probably will last for weeks or even months on the included battery.
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