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Old 10-20-2007, 11:27 AM   #19 (permalink)
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Originally Posted by ezrunner
What is the normal output of a usb port? The charging circuit controls the draw to a max of approx 500ma. That is why you can use a charger that sends 2000ma because the charging circuit will not allow anymore. The charging circuit can't tell the USB to send more current. If a typical BB uses 500ma and the usb port only sends 100ma then that is all the BB can draw upon. I may be wrong been a long time since i dealt with electronics
I think its only 100ma until something tells the USB port to give more current. That is why it says insufficent power to recharge device when the BB desktop is not installed. When it is, the software recognizes the device and ups it to 500.
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