iPhone genius bar tool

So I went in today to the apple genius bar. Long story short it was because of battery life, and was apparantly caused by apps that weren't functioning properly. 3/5 of which were default apps. And that meant I had a corrupted 3.0 os. Well did a full restore as a new phone.

Battery life is the exact same. I'm wondering if the way the genius saw the problem is available to the public? Or if it is already on iTunes and I'm not seeing how to use it.

Also as a side question. Does battery need to be reconditioned after a full restore?