I’m sorry, but Matsushita lost my battery business right here:

Reporters were also shown audio players powered by a regular battery vs. Oxyride. The one with Oxyride delivered a stronger, deeper bass, and Matsushita officials said some music experts express a preference for Oxyride.

Yes, not only does their battery last significantly longer in portable devices, it makes them sound better, too. I’m surprised they didn’t also claim that it improves the contrast on your digital camera.