Nikon D4 - Manual (Page 436)

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Turn the product off before removing or disconnecting the power source : Do not
unplug the product or remove the battery while the product is on or while
images are being recorded or deleted. Forcibly cutting power in these
circumstances could result in loss of data or in damage to product memory
or internal circuitry. To prevent an accidental interruption of power, avoid
carrying the product from one location to another while the AC adapter is
connected.
Dry the accessory shoe cover : If the camera is used in the rain, water may
penetrate the supplied BS-2 accessory shoe cover. Remove and dry the
accessory shoe cover after using the camera in the rain.
Notes on the monitor : The monitor is constructed with extremely high
precision; at least 99.99% of pixels are effective, with no more than 0.01%
being missing or defective. Hence while these displays may contain pixels
that are always lit (white, red, blue, or green) or always off (black), this is not
a malfunction and has no effect on images recorded with the device.
Images in the monitor may be difficult to see in a bright light.
Do not apply pressure to the monitor, as this could cause damage or
malfunction. Dust or lint on the monitor can be removed with a blower.
Stains can be removed by wiping lightly with a soft cloth or chamois
leather. Should the monitor break, care should be taken to avoid injury
from broken glass and to prevent liquid crystal from the monitor touching
the skin or entering the eyes and mouth.
Batteries : Batteries may leak or explode if improperly handled. Observe the
following precautions when handling batteries:
• Use only batteries approved for use in this equipment.
• Do not expose the battery to flame or excessive heat.
• Keep the battery terminals clean.
• Turn the product off before replacing the battery.
• Remove the battery from the camera or charger when not in use and
replace the terminal cover. These devices draw minute amounts of
charge even when off and could draw the battery down to the point that
it will no longer function. If the battery will not be used for some time,
insert it in the camera and run it flat before removing it from the camera
for storage. The battery should be stored in a cool location with an
ambient temperature of 15 to 25 °C (59 to 77 °F; avoid hot or extremely
cold locations). Repeat this process at least once every six months.