I have had my Desire since August (2011) and I am kind of sick of how quickly the battery goes. I am lucky if I get 9 hours out of it on minimal use. For instance today I have gone on facebook a handful of times, and sent and received about 10 texts. I have wi-fi and gps turned off. I do have sync on but that is about it. I don't have any task killers and it is on yellow after about 9 hours. The other day I was on facebook pretty heavily and texting and it only lasted about 3 and a half hours. This just seems weird to me. I have tried the battery calibration thing and I have not seen any difference. Any other suggestions or is this just the way this phone is? I like it otherwise but it is hard when I have to be out of my office for work and can't trust my phone to work much past 4 hours if God forbid I have to send a few emails.
! Are you rooted? If so which ROM (if any) are you using? If you are rooting you can attempt to tweak your voltage/cpu usage by changing your kernel, but this is root/rom depending..