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I wonder how this is powered. Is it powered by the Kindle or does it have its own battery, possibly even boosting that of the Kindle?
Probably the best for usability would be if it could be left plugged into the Kindle and have a separate port that could be attached to a charger. I suspect that connecting and disconnecting different micro-USB cables isn't fun for a person with limited eyesight. I doubt that they did it that way though.
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