On Oct 17, 2007, at 6:33 PM, David Leinbach wrote: > I think the 45 hours simply refers to how much music they think you > should be able to fit on the built-in memory (notice it says "No Wi- > Fi connection on your journey? No need, the Nokia N810 offers up to > 45 hours of music playback..."). Here's a quick chart of battery capacities: iPhone: 24h of music, 1.4 Ah battery: 17h / Ah (17 hours per amp-hour) iPod Shuffle: 12h of music, 0.22 Ah battery: 55h / Ah Potential: Nokia N810: 45h of music, 1.5 Ah battery: 30h / Ah I think those numbers make it clear that 45 hours of music-only direct from flash is somewhat plausible. I'm sure it would require very careful hardware and software integration, of course, but it could be done. Thanks, gopi.