[KrazyKevin76]

I'm with muffinman, no scientific concrete proof here, but battery life was one of the top two issues I had with the TP1, the other being signal strength. I just got my phone yesterday. I pulled it off the charger last night around 9:30pm to get a full charge. Since then here are my stats:
Standbye time: 10hrs 33 min
Talk time: 4min
Device Usage: 3hr 8min

With all that I'm still at 30% on my battery. It might not sound good, but I probably viewed over an 1hr of video from sprint tv. Lots of internet. I have my screen a tick above the middle setting on brightness. I don't know if its the signal strength thats helping or what but, this guy is way better on battery and signal. That with a solid feel to the phone, I love it.

I've also heard people stating that their battery life improved constantly over the first week they had their phone. I guess after a few charges and discharges. Hang in there.