Sony supplies a power brick for the reader. How hard is it to use to charge the reader when you don't have a USB port connected to a machine running Connect or Libprs500? And using the power brick takes less time to charge the reader and can charge from a fully discharged battery. Using the USB port still need to have enough power left to deal with the USB port. Besides, I have an iGO power adaptor to charge our cell phones in the car and all I did was buy a tip for the PSP and now I can also charge the Sony in the car.
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