I'm new to the PRS-505 but not to electronics or technology and I am mystified
at most of your comments on this subject.
Why would any of you, who have already invested $300.00 plus dollars on a delightfully designed PRS-505 reader, purchase a substandard power adapter that allows you to efficiently charge your reader - penny wise dollar stupid.
I have three PSP's but I purchased the Sony PRS-505 power adapter from Sony because there is a certain continuity to my act - Sony Reader and Sony power adapter for Sony Reader and manufactured and WARRANTIED by Sony. To do otherwise is simply silly from a investment point of view.
Personally I think that $29.99 for a Sony PRS-505 power adapter is cheap for peace of mind.
Hunter