XENAS, you have to factor in the fact that many of these things were running concurrently. I had over 2hrs of mp3 in one burst, but with the mobile connection on. Likewise, the 1hr+ call also had Wifi running simultaneously. Some of the app use was games, with a much higher rate of battery use. I forgot to mention about 15 photos taken throughout the day, most with flash as indoors. I also play about with RobotView app, that links pics with the phone location and lets you see them in realtion to where they are taken with the viewfinder on (it's a lot of fun, pointless, but fun), which is probably using a fair bit of power. The screen is very efficient, but using it that way will suck up power. It is also possible that the Wifi was on overnight, or at least half of it.
My point is, that you may well get 20 hours of music playback from the Desire if you turn everything else off, including the calendar, and I mean 'OFF'. My estimates are based on having the phone on as a phone, alongside the other loveliness that 'super'/smartphones offer. I am very impressed by the battery life, but am no 'power user'
! Nevertheless, it is an interesting thread you are following here and I think I see what you are getting at, but I feel that it is wrong to think of this in the terms of a single point of use. The time that Ninetothesky quotes is probably from BatteryTimeLite (or similar), which reports a similar amount on my phone, but it is an estimate as the app does not have a specific setting for the Desire. It is likely a reasonable estimate, but not related to it being an mp3 player exclusively (i.e. disregarding everything else. I had an SE C902, which had a very respectable battery life under heavy use, but in no way has the functionality (or screen) of the Desire. If you want a phone that will last forever playing mp3's, whilst also working as a phone for calls and texts, I'd go way back to the SE W810i!
Anywho, sorry for the long post and I hope you don't take this the wrong way, but I think you need to think of the Desire as a phone with a music player, rather than as a music player with a phone. Moreover, any comparison with the iPhone is unclear, as the iPhone was developed from the iPod and, latterly, iTouch, and is set up to handle the music player accordingly as a core 'function', the reliance on iTunes further implies this... I would argue that the iPhone (as lovely as it is) is essentially an iPod/Touch that makes calls (and only recently, texts
). Either way, I'll follow this thread with interest.
best
k