Hi, Does anyone if one compressed format versus another consumes more power? I have the Sony 1GB NW-E107 flash player which claims upto a 70 hour battery life on 1 AAA battery. The fine print however mentions its under conditions playing ATRAC3 @ 105kbps. This leads me to believe that different formats (MP3, ATRAC3plus...) and even different rates have different power consumptions. I only have my player half full with MP3's and ATRAC3plus @ 64K. So space isn't really an issue and I would re-rip my CD's at ATRAC3 @ 105kbps if it meant my battery would last longer. But if the power consumption difference is negligable, then I wouldn't bother. As for quality, I'm not a stickler as I can't tell the difference between MP3's and ATRAC3's or ATRAC3plus' at various rates on a noisy bus or subway. Thanks!