Nikon D3100 - Manual (Page 201)

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To prevent mold or mildew, take the camera out of storage at least once a month. Turn the
camera on and release the shutter a few times before putting it away.
Store the battery in a cool, dry place. Replace the terminal cover before putting the battery
away.
Notes on the monitor : The monitor may contain a few pixels that are always lit or that do not light.
This is common to all TFT LCD monitors and does not indicate a malfunction. Images recorded
with the product are unaffected.
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.
Moiré : Moiré is an interference pattern created by the interaction of an image containing a
regular, repeating grid, such as the pattern of weave in cloth or windows in a building, with the
camera image sensor grid. If you notice moiré in your photographs, try changing the distance
to the subject, zooming in and out, or changing the angle between the subject and the
camera.
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 and storing it in a 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.
• The internal temperature of the battery may rise while the battery is in use. Attempting to
charge the battery while the internal temperature is elevated will impair battery
performance, and the battery may not charge or charge only partially. Wait for the battery
to cool before charging.
• Continuing to charge the battery after it is fully charged can impair battery performance.
• A marked drop in the time a fully charged battery retains its charge when used at room
temperature indicates that it requires replacement. Purchase a new EN-EL14 battery.
• Charge the battery before use. When taking photographs on important occasions, ready a
spare EN-EL14 battery and keep it fully charged. Depending on your location, it may be
difficult to purchase replacement batteries on short notice. Note that on cold days, the
capacity of batteries tends to decrease. Be sure the battery is fully charged before taking
photographs outside in cold weather. Keep a spare battery in a warm place and exchange
the two as necessary. Once warmed, a cold battery may recover some of its charge.
• Used batteries are a valuable resource; recycle in accord with local regulations.