Citizen E820 - Guide to Watch Charging Times

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Guide to Charging Time
Below are the approximate times needed for charging when exposing the
watch dial to light continuously.
Please use this table as a reference only.
＊ To charge the rechargeable cell fully, it is recommended to expose the dial to direct
sunlight. A uorescent lamp or interior lighting does not have sucient illumination to
charge the rechargeable cell fully.
Environment
Illuminance
(Lx)
Charging time (approx.)
To work for
one day
To start working
normally when the
cell is discharged
To become fully
charged when the
cell is discharged
Outdoors (sunny) 100,000 2 minutes 1 hour 6 hours
Outdoors (cloudy) 10,000 11 minutes 4 hours 45 hours
20 cm from a uorescent
lamp (30W)
3,000 35 minutes 13 hours 150 hours
Interior lighting 500 3.5 hours 80 hours —