Citizen U70 series, Owner'S Manual

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English
Charging the
energy storage cell
7 Charging time
Below are the approximate values for when exposing the dial to light continuously.
Illuminance
(Lx)
Environment
Time for charging fully
when the
energy cell
is
fully depleted
(approx.)
Charging time needed for
1-day movement (while
the second hand moves
normally) (approx.)
3,000
20 cm (8 in.) under
a fluorescent lamp
(30 W)
200 hours 40 minutes
10,000
Under cloudy
weather
60 hours 12 minutes
100,000
Under direct
sunlight in summer
30 hours 3 minutes
You can calculate the amount of power the watch can get.
For example, if the
energy cell
is charged under cloudy weather for about 4 hours, the
watch will get the power for approx. 20 days.
To charge the
energy cell
, expose the dial to brighter light for a long time.
Sunlight is more effective than fluorescent lamps.
• You can put the watch under direct sunlight for a long time if the temperature of
the watch is kept under 50˚C/122˚F.
<After the
energy cell
is fully charged—Overcharge prevention function>
When the
watch
becomes fully charged, the overcharging prevention function is
activated automatically to prevent excessive charging.