Google Android 2.3 User Manual page 47

Android basics
Monitor and control what uses the battery
The Battery Use screen shows which applications consume the most battery power.
You can also use it to turn off applications that you've downloaded, if they are
consuming too much power.
S On the Home screen, press Menu
Battery use.
The Battery Use screen lists the applications that have been using the battery,
from greatest to least battery use.
The discharge graph at the top of the screen shows the pace of battery discharge
since you last changed the phone (short periods of time when you were connected
to a charger are shown as thin green lines at the bottom of the chart), and how
long you've been running on battery power.
S Touch an application in the Battery Use screen to learn details about its power
consumption.
Different applications offer different kinds of information. Some applications
include buttons that open screens with settings to adjust power use.
Touch the discharge graph to open a screen with details about when the phone's
S
radios, screen, and other features were using the battery.
AUG-2.3-103
and touch Settings > Applications >
Touch the discharge graph to open a
screen with details about battery use by
the phone's screen, radios, and other
features.
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Android User's Guide