Nikon NIKKOR Z 70-200mm f/2.8 VR S Lens - Manual (Page 55)

31 First Steps
D
The CHARGE Lamp
If the battery cannot be charged using the charging AC adapter, for
example because the battery is not compatible or the temperature of
the camera is elevated, the
CHARGE lamp will flash rapidly for about 30
seconds and then turn off. If the CHARGE lamp is off and you did not
observe the battery charging, turn the camera on and check the
battery level.