Panasonic FZ-G2 Series Operating Instructions Manual page 21

To conserve power, the following power saving methods are set at the time of purchase.
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The screen automatically turns off after :
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10 minutes (when AC adaptor is connected) of inactivity
4 minutes (when operating by battery power) of inactivity
The computer automatically enters sleep
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10 minutes (when AC adaptor is connected) of inactivity
4 minutes (when operating by battery power) of inactivity
*1 : Refer to "Sleep/Hibernation Functions"
*1
after :
about resuming from sleep.