Nikon Coolpix S02 Reference Manual page 82

Shoot
The camera will turn on automatically and begin charging
when connected to a computer. Charging will end if the
camera is turned off.
Turn the camera off before connecting or disconnecting the
USB cable.
About 2 hours and 50 minutes are required to charge the
battery by computer when no charge remains. Copying
pictures to the computer increases the charging time. Once the
battery is fully charged, the camera will turn off automatically if
no data are exchanged with the computer for 30 minutes.
If the power-on lamp rapidly flashes, the camera cannot
charge. Ensure that the ambient temperature is in the correct
range (5 °C–35 °C/41 °F–95 °F), the USB cable is correctly
connected, and that the computer is not in sleep mode and is
configured to supply power to the camera (note that
depending on their specifications, some computers may be
unable to supply power to the camera).
View Connect The Setup Menu Technical Notes
Computer Charging
72