Canon EOS-1D Mark II N Manual De Instruções

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The date/time (back-up) battery’s service life is about 5 years. If the 
date/time is reset when the battery is replaced, replace the back-up 
battery with a new CR2025 lithium battery as described below. 
1
Set the <
4
> switch to <
2
and remove the battery pack. 
 
The back-up battery is on the ceiling 
of the battery compartment. 
2
Remove the back-up battery 
cover. 
 
Use a small Philips screwdriver.
 
As shown in the diagram, loosen the 
screw to remove the cover. 
 
Be careful not to lose the screw.
3
Remove the battery. 
4
Install a new back-up battery. 
 
The plus side of the battery must face 
up. 
5
Attach the cover. 
 
Install the battery and turn the <
4
switch to <
1
>. The date/time will be 
displayed on the LCD monitor. Set 
the date/time. 
Replacing the Date/Time Battery
(+)