5. General Reference for Charging Times
The time required for charging varies according to the model of the watch (color of the
dial, etc.). The following times are shown below to serve only as a reference.
* Charging time refers to the amount of time the watch is continuously exposed to light.
Illuminance
(lux)
500
Environment
Inside an ordinary office
Charging time
3 hours 25 hours
Approx. charging
time from the
stopped state until
1-second interval
movement
Approx. charging
time from the
stopped state until
fully charged
-----
1,000
60-70 cm (24-28 in) under a
fluorescent lamp (30 W)
1.5 hours 12 hours
-----
3,000
20 cm (8 in) under a
fluorescent lamp (30 W)
30 minutes 4.5 hours 80 hours
10,000
Outdoors, cloudy weather
9 minutes 2 hours 25 hours
100,000
Outdoors, summer, under
direct sunlight
3 minutes 45 minutes 11 hours
Approx. charging
time for 1 day of
operation
Full charging time: Time required for charging the watch from the stopped state to fully charged.
Charging time for 1 day of operation: Time required for charging the watch to run for 1 day at 1-second
interval movement.
10 11
[Over Charge Prevention Feature]
When the secondary battery becomes fully charged as result of light shining into the
watch dial (solar cell), the over charge prevention feature is activated automatically to
prevent the battery from being charged further. This prevents the performance of the
solar cell and secondary battery from deteriorating no matter how much the watch is
charged, and lets you expose the watch to light without worrying about overcharging.
