HTC Desire HD or Samsung Galaxy S?

[RSR]

How many days did you have it? Did you do much in the way of power management?

Around 7 days give or take a few. Not a lot really, I set it up the same as the X10 which is a pretty much default setting, GMail on push, other email syncing every hours etc.... The only thing I did turn off when leaving the house was the WiFi.