Quote:
Originally Posted by DaleDe
there is only so much current available in a USB port. If you use it all running the device there is none left to charge the battery. As a matter of fact it is possible for the battery to run down while it is plugged into a computer if there is not enough current available to keep up with the activity. The AC charger will output 1000 mA while a Computer only does 500 best case and depending on additional loads from other devices it might have only 100 mA left available.
Dale
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Well, like theducks says, the device reports that it charging, and mine went from 3 bars to 4 bars while I was playing around with transferring files to it. That seems proof enough that it does charge after you have pressed OK. If you aren't changing pages, or actually transferring files, the device doesn't need to draw ANY significant power - probably no more than if you pressed "any other key" and it was showing the charging screen and light.