I just posted this on the sprint community forums:
I got the Battery Graph app, and it has been pretty enlightening even though I haven't had it a full day yet.
According to the graph (which reads from system info, not absolute info) my phone's battery took 3.3 hours to go from 5% charge to 100%. With the GPS on, the battery indicator went from 100% to 80% in 15 minutes. However, I do not believe that this means I had actually depleted 20% of my battery's juice in that time. Rather, I think the phone and/or battery has a really terrible way of estimating its capabilities.
Why? Last night I turned GPS on and the battery went from 50% to 15% in 30 minutes, but then held steady at 15% for 3 hours before dropping to 5%, at which point I hooked it up to AC power.
Also, around 50%, the graph has a tendency to jump between 50% and 60% sometimes several times before it drains/charges past that point.
After reading several discussions on this forum and the Android forums, I believe the phone also has issues with background apps 'pushing' for info too often and draining power unnecessarily.
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