Sony DSC-U20 - Manual (Page 94)

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On moisture condensation
If the camera is brought directly from a cold to a warm
location, or is placed in a very damp room, moisture
may condense inside or outside the camera. Should this
occur, the camera will not operate properly.
Moisture condensation occurs easily when:
• The camera is brought from a cold location such as a
ski slope into a warmly heated room.
• The camera is taken from an air-conditioned room or
car interior to the hot outdoors, etc.
How to prevent moisture condensation
When bringing the camera from a cold place to a warm
place, seal the camera in a plastic bag and allow it to
adapt to conditions at the new location over a period of
time (about an hour).
If moisture condensation occurs
Turn off the camera and wait about an hour for the
moisture to evaporate. Note that if you attempt to shoot
with moisture remaining inside the lens, you will be
unable to record clear images.
On internal rechargeable button battery
This camera has an internal rechargeable button battery
for maintaining the date and time and other settings
regardless of whether the power is on or off.
This rechargeable button battery is continually charged
as long as you are using the camera. However, if you
use the camera for only short periods it discharges
gradually, and if you do not use the camera at all for
about one month it becomes completely discharged. In
this case, be sure to charge this rechargeable button
battery before using the camera.
However, even if this rechargeable button battery is not
charged, you can still use the camera as long as you do
not record the date and time.
Charging method of rechargeable button battery
Install charged size AAA Nickel Metal Hydride
batteries, and leave the camera for 24 hours or more
with the power off.