[Cecily]

any power with 5.2 v will work. My reader has a yellow collar around the power input, and it matches the yello ring around the 5.2V AC adapter.

ANOTHer ?: anyone know of a lightweight power cord that will charge the ebook 500 from a 'hot' USB port? E.g., plug into the polwer port on the reader, and a live USB port on computer..avoids having to carry around another power "brixk". thanks