Strange Battery Performance Increase

Noticed something a little odd over the past couple days. I have been having absolutely horrible battery performance for a couple months on my At&t Bold running 4.6.0.244. It was so bad I have been thinking it was a defective or damaged battery. I was having to charge about twice a day, after only very little use. It was literally draining to the point where the radio was shutting off. This drainage was happening even with just some light reading of email, some basic internet browsing, and there were no extra programs running in the background etc etc.

For a completely unrelated reason, I unlocked my Bold's Engineering Screen and poked around a little bit. I didn't change anything to my knowledge. As of the very same day I unlocked the engineering section, I am now getting almost two whole days between charges. I am even using my phone more that I was before and the charge is holding strong.

So, its either an extreme and unexplainable coincidence and my battery is magically working better all of a sudden OR unlocking the phone's engineering screen changed something. I know how ludicrous and unlikely that sounds, but it is interesting none the less.

Just thought I'd share.