Sprint Diamond (battery): How many hours of talk time do you get?

[aanast2]

Since I purchased my new Diamond two weeks ago, I've read every Diamond battery thread on sprintusers, most on here, and and many threads on xda. I have also done quite a bit to help my Diamond's battery life. However, I still only get about 1.5-2 hours talk time even if I do not use the phone for anything else.

Here's everything I have turned off:
wifi, gps, bluetooth, beam, auto back light sensor, data, push email, voice command, weather updates.

Here is what else I have tried:
lowered the backlight. I keep it off most of the time.
used the power saving settings on the Diamond Tweaks cab.
Flashed to a new radio 1.11 (from 1.00)
Done reg edits to reduce battery polling frequency.
Made sure Opera actually exits.
Kill Opera and any other nonessentials on startup using dotFred's task manager.
Tried Sprint Only, Hybrid, forced roaming, and 1X even to no avail.
changed ACCOLC to be 8.
changed the Slot Cycle Index (SCI) to 2.
Underclocked with nuechem's program.

However, with little use besides talking, I still can't get more than an hour and a half or so talking on it.

I have not flashed to a custom Rom like Mighty yet (which I know someone will recommend) but I did take it in to a Sprint Repair Store. They basically just hard reset it & told me a third party application(2) that is draining my battery. One guy there thought was Slide 2 Unlock. I had many cabs, games, apps on the phone but rarely used them (s2u2 and changescreen were the only ones always running.)

Even though the phone is back to factory settings, I'm still having poor battery performance. I wonder if it is the phone or battery or both and if I get a new phone and/or battery if I will have the same problem.

What I really want to know is:

How many hours of talk time do you get on your Diamond?