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Operation Guide 4709 4713
Power Supply
This watch is equipped with a solar cell and a special rechargeable battery (secondary
battery) that is charged by the electrical power produced by the solar cell. The
illustration shown below shows how you should position the watch for charging.
Example: Orient the watch so its face
is pointing at a light source.
• The illustration shows how to position
a watch with a resin band.
• Note that charging efficiency drops
when any part of the solar cell is
blocked by clothing, etc.
• You should try to keep the watch
outside of your sleeve as much as
possible. Charging is reduced
significantly if the face is only partially
covered.
Important!
• Storing the watch for long periods in an area where there is no light or wearing it in
such a way that it is blocked from exposure to light can cause rechargeable battery
power to run down. Make sure that the watch is exposed to bright light whenever
possible.
• This watch uses a special rechargeable battery to store power produced by the solar
cell, so regular battery replacement is not required. However, after very long use, the
rechargeable battery may lose its ability to achieve a full charge. If you experience
problems getting the special rechargeable battery to charge fully, contact your dealer
or CASIO distributor about having it replaced.
• Never try to remove or replace the watch's special battery yourself. Use of the wrong
type of battery can damage the watch.
• The current time and all other settings return to their initial factory defaults whenever
battery power drops to Level 5 and when you have the battery replaced.
• Turn on the watch's Power Saving function and keep it in an area normally exposed
to bright light when storing it for long periods. This helps to keep the rechargeable
battery from going dead.
To check the current battery level
Press B to display the battery level indicator.
Battery level indicator
The battery power indicator shows you the current power level of the rechargeable
battery.
Level
Battery Power Indicator
All functions enabled.
1
2
All functions enabled.
Alarm, hourly time signal, illumination and
3
time calibration signal reception disabled.
(Charge Soon Alert)
4
All functions disabled.
(Charge Soon Alert)
All functions, including timekeeping,
5
disabled and initialized.
• The
indicator at Level 3 and the flashing charge indicator (C) at Level 4 tell you
that battery power is very low, and that exposure to bright light for charging is
required as soon as possible.
• At Level 5, all functions are disabled and settings return to their initial factory
defaults. Functions are enabled once again after the rechargeable battery is
charged, but you need to set the time and date, after the battery reaches Level 4
(indicated by the flashing charge indicator (C)) from Level 5. You will not be able to
configure any of the other settings until the battery reaches Level 3 (no charge
indicator) after dropping to Level 5.
• Leaving the watch in direct sunlight or some other very strong light source can cause
the battery power indicator to show a reading that is momentarily higher than the actual
battery level. The correct battery power indicator should appear after a few minutes.
• The watch's Home Time Zone setting will change automatically to UTC +9 whenever
the battery drops to Level 5.
With this Home Time Zone setting, the watch is configured to receive the time
calibration signals of Japan.
If you are using the watch in North America or Europe, you will need to change the
Home Time Zone setting to match your location whenever the battery drops to Level 5.
• If you use the illumination or alarms a number of times during a short period, the
hands of the watch will stop. Battery Level Indicator will show "R" at this time. Also,
the following operations will become disabled until battery power recovers.
Illumination
Beeper tone
Time calibration signal reception
After some time, battery power will recover and the above functions will be enabled
again.
Charging Precautions
Certain charging conditions can cause the watch to become very hot. Avoid leaving
the watch in the areas described below whenever charging its rechargeable battery.
Also note that allowing the watch to become very hot can cause its liquid crystal
display to black out. The appearance of the LCD should become normal again when
the watch returns to a lower temperature.
Warning!
Leaving the watch in bright light to charge its rechargeable battery can cause it
to become quite hot. Take care when handling the watch to avoid burn injury.
The watch can become particularly hot when exposed to the following
conditions for long periods.
• On the dashboard of a car parked in direct sunlight
• Too close to an incandescent lamp
• Under direct sunlight
Solar cell
Function Status
Charging Guide
After a full charge, timekeeping remains enabled for up to about 6 months.
• The following table shows the amount of time the watch needs to be exposed to light
each day in order to generate enough power for normal daily operations.
Exposure Level (Brightness)
Outdoor Sunlight (50,000 lux)
Sunlight Through a Window (10,000 lux)
Daylight Through a Window on a Cloudy Day
(5,000 lux)
Indoor Fluorescent Lighting (500 lux)
• For details about the battery operating time and daily operating conditions, see the
"Power Supply" section of the Specifications.
• Stable operation is promoted by frequent exposure to light.
Recovery Times
The table below shows the amount exposure that is required to take the battery from
one level to the next.
Exposure Level
Approximate Exposure Time
(Brightness)
Level 5
Outdoor Sunlight
2 hours
(50,000 lux)
Sunlight Through a Window
7 hours
(10,000 lux)
Daylight Through a Window
10 hours
on a Cloudy Day (5,000 lux)
Indoor Fluorescent Lighting
112 hours
(500 lux)
• The above exposure time values are all for reference only. Actual required exposure
times depend on lighting conditions.
Timekeeping
Use the Timekeeping Mode to set and view the current time and date.
• When setting the time, you can also configure settings for the 12/24-hour format,
and you can specify the screens that are displayed in the Timekeeping Mode.
• In the Timekeeping Mode, you can press C to change the display contents as
shown below.
Home Time (Seconds)
PM indicator
Day of week
Date
L
Home Time
(Hour : Minutes)
Setting the Time and Date
Make sure you select your Home Time Zone before you change the current time and
date settings. Dual Time Mode times are all displayed in accordance with the
Timekeeping Mode settings. Because of this, Dual Time Mode times will not be correct
if you do not select the proper Home Time Zone before setting the time and date in the
Timekeeping Mode.
To set the time and date
1. In the Timekeeping Mode, hold down A until the UTC
differential value starts to flash, which indicates the
setting screen.
2. Press B to change the flashing contents in the
sequence shown below to select other settings.
Time Zone
12/24-Hour
DST
Time Zone
Format
Language (day of the
Day
week indicator)
3. When the setting you want to change is flashing, use C to change it as described
below.
Screen:
To do this:
Change the time zone
Cycle between auto DST ( ), Standard Time
(
), and Daylight Saving Time (
Toggle between 12-hour (
(
) timekeeping
Reset the seconds to
Change the hour or minutes
Change the year
Change the month, or day
Toggle the language of the day of the week
indicator between English and Japanese
:
:
:
:
• Auto DST (
) can be selected only while UTC +0, UTC +1, UTC +2, UTC +8,
UTC +9, UTC –10, UTC –9, UTC –8, UTC –7, UTC –6, or UTC –5
( DST ON : UTC +1, UTC +2, UTC +3, UTC +9, UTC +10, UTC –9, UTC –8, UTC
–7, UTC –6, UTC –5, or UTC –4 ) is selected as the Home Time Zone. For more
information, see "Daylight Saving Time (DST)" below.
Approximate Exposure Time
8 minutes
30 minutes
48 minutes
8 hours
Level 4
Level 3
Level 2
Level 1
24 hours
6 hours
89 hours
21 hours
144 hours
33 hours
– – –
Month – Day
Home Time
(Seconds)
Seconds
Hour
Month
Year
Minutes
Do this:
Use C (east).
Press C.
)
Press C.
) and 24-hour
Press C.
Use C.
Press C.
:
:
:
4
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