Features of the solar watch
Running time
Expected running time from full charge to stoppage will be around 4 months.
This watch is a solar-powered watch containing a solar cell underneath the dial to convert any form of light into
"electrical energy" and store the power in a secondary battery.
Unlike conventional quartz watches, this watch does not use a silver oxide battery, thus eliminating the need
for battery replacement.
Over charge prevent function
If the secondary battery is charged more than predetermined voltage, over charge prevent function is
operated to prevent the secondary battery deterioration and breakage.
When the energy stored in the secondary battery is reduced to an extremely low level, the second hand starts
moving at two-second intervals instead of the normal one-second intervals. In that case, recharge the watch as
soon as possible by exposing it to light. Otherwise, the watch may stop operating in about 2 weeks.
Power depletion warning function
How to charge and start the watch
Charging the watch
Caution
When charging the watch, do not place it too close to fluorescent lamp or other light sources as the watch
temperature will become extremely high, causing damage to the parts inside the watch.
(1) Expose the watch to sunlight or strong artificial light (of more than 1,000 lx).
When the watch has stopped operating, the second hand will start moving at two-second intervals.
(2) Keep the watch exposed to the light until the second hand moves at one-second intervals.
(3) When the watch is charged after it has completely stopped, set the date and time before wearing the
watch.
When you start the watch or when the energy remaining in the secondary battery is very low, charge it
sufficiently by exposing the watch to light.
-The second hand immediately starts moving at two-second intervals, but the energy stored in the secondary battery is not yet
sufficient. If the watch is turned away from the light, it may stop operating.
It is not necessary to charge the watch fully. It is important, however, to charge the watch sufficiently, especially in the case of
initial charging.
To prevent energy depletion
•Avoid covering the watch face with your clothing while wearing it.
•When the watch is not in use, leave it in a brightly lit place for as long as possible.
Make sure that the watch temperature does not exceed 50℃.
Guidelines for charging time
Condition A : Time required for full charge
Condition B : Time required for steady operation
Condition C : Time required for 1 day's charge
Even if the watch is not charged for the time specified in the column, the second hand may temporarily move at one-
second intervals. But it will soon resume moving at two-second intervals; therefore, charge the watch for more than the
specified period.
(*) The values in this column represent the charging times required until the second hand moves constantly at one-second intervals
after the watch starts operating with the second hand moving at two-second intervals.
Illumination
(lx) Source of light Environment A
(Approx. Hours)
B(*)
(Approx. Hours)
C
(Approx. Minutes)
700
A fluorescent lamp
Inside the office －18 69
3,000 30W 20cm 52 415
10,000
Sunlight
Cloudy 16 1.5 5
100,000 Fine weather 5.3 0.5 2
The below table provides only general guidelines.
(Dial transparency rate：30% )
Battery indicator
Always display the power storage level.
Improve the convenience of solar watch.
