Nikon D3 - Manual (Page 420)

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5
Close the clock battery chamber.
Slide the clock battery chamber cover
towards the back of the main battery
chamber until it clicks into place.
6
Replace the main battery.
Reinsert the EN-EL4a.
7
Set the camera clock.
Set the camera to the current date and
time (pg. 39). Until the date and time
have been set, the B icon will flash in
the top control panel.
D
Inserting the Clock Battery
Insert the clock battery in the correct orientation. Inserting the battery
incorrectly could not only prevent the clock from functioning but could
damage the camera.