Canon POWERSHOT A480 User Manual page 39

To save battery power, the camera shuts down automatically when it is not
operated for a certain time.
Power
Saving during Shooting
The monitor will turn off approximately 1 minute after the camera is last
operated. After about 2 more minutes, the lens will retract and the power will
turn off.
When the monitor has turned off but the lens has not retracted yet, pressing
the shutter button halfway (p. 19) turns on the monitor and shooting can
continue.
Power Saving during Playback
The power will turn off approximately 5 minutes after the camera is last
operated.
The indicator on the back of the camera (p. 38) will light or blink green when
images are being recorded to/read from the memory card, or during any kind
of transfer (p. 21).
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