AA battery powered mp3 player?

I’m also the one who want to tell sandisk that I prefer aa/aaa powered mp3 player to any li-ion powered players. One of my friends has Panasonic SV-MP020. It’s 2Gb and provides extensive 75-hour playback using just one AA alkaline battery. Its sound quality is also good. When my Clip wears out, I have to throw it into the garbage. But for the player using aa/aaa battery, you just change the battery and it works again.

I wish Sandisk will look at this niche market and release one with aa/aaa and great sound quality.