Finally I did a couple of things which really affected the battery life, last night I was sending mails and some surfing for about 3 hrs on battery less than 5%, it's great victory for me in the recent days anyway!
And let me tell u what I did after ofcourse checking almost every app and modules activity and cpu usage and so on, I did a device wipe on user installed apps in the security wipe, everything was gone, including the instant messengers in the (Aim, Yahoo, Live, GTalk), after that I noticed that the battery seems to be back in normal condition, the phone was getting warm just a bit and the battery wasn't draining as fast as before, in fact I felt it's back to normal! So I thought it was maybe one of my installed games caused the problem (cause I had just some games left on the phone at that time), so went to install the messengers from appworld, Aim, Live, Gtalk and noticed that Yahoo! Messenger isn't supported by my carrier according to what appworld said, anyway I installed it from Y! Web site and unbelievably saw that after each of these four, the phone's gettin' warmer and the battery level lowerin' faster!
I sure am thirsty to find the answer to this! And realized that I activate my Gmail as an enterprise account, I don't know if this related to the issue or not, but I deactivated that and set up Gmail and Y!Mail just as a mailbox.
Anyway after a couple of days, at least I've found the reason, and as a result today after doin' a lot of stuff with my phone, un\delete service books, mailboxes, contact sync/wipe, using/ IM+ lite, e-mails, browsing, several battery pulls and reboot, deleting app and etc. On 3G, the battery is 45% in the device info.
And this was my essay on How I Spent The Last Few Days on BB!

Any ideas especially about the IM apps? I need'em anyway!