One thing to note - almost all recent Sony devices which charge by USB use the Host Mode to charge... including the PS3 wireless controllers, keyboards, Bluetooth headsets, and even the PSP Slim. This means that the PS3 AC Adaptor (model # CECHZA1) should work for the PRS-300 and PRS-600, since they`re also Sony devices which follow this same ŮSB Host Mode charging`method. They output at 5V and 500mA, the same as a regular USB port, but with intelligent mode on by default, and can host two USB devices at the same time.
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