Sony a7SIII Help Manual page 70

The actual status may differ depending on the ambient temperature and the condition of the battery pack.
Charging time (Full charge): The charging time is approximately 150 min.
The above charging time applies when charging a fully depleted battery pack at a temperature of 25°C (77°F).
Charging may take longer depending on conditions of use and circumstances.
Note
Use a nearby wall outlet (wall socket) when using the AC Adaptor/Battery Charger. If any malfunction occurs, disconnect the plug
from the wall outlet (wall socket) immediately to disconnect from the power source.
If you use the product with a charge lamp, note that the product is not disconnected from the power source even when the lamp
turns off.
Before charging, be sure to also read
Related Topic
Inserting/removing the battery pack
Notes on the battery pack and charging the battery
"Notes on the battery pack and charging the
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battery."