Hmm... I recently requested an AC adapter from SonicBlue because my Rio Car didn't include one in the box. They sent me one made by CIC Computer, Inc. It has a model number of NP12-1S1210 and seems to be almost "pocket-sized". It looks like more of a "travel charger" than a full-sized adapter with a "brick". Maybe this is a good alternative for those of you having problems with the other one?