Citizen E87 Manual page 22

◆ Charging time by environment
Below are the approximate times required for charging when exposing the watch dial to light
continuously. Please use this table as a reference only.
Environment
Outdoors (sunny)
Outdoors (cloudy)
20 cm from a fluorescent lamp
(30W)
Interior lighting
Fully charged to fully discharged:
Approximately 7 months (at normal operation), approximately 1.5 years (at the power save
mode)
Illuminance
To work for one
(lux)
day
100,000 2 minutes
10,000 11 minutes
3,000 40 minutes
500 4 hours
Charging your watch
Charging time (approx.)
To start working
normally when the
cell is discharged
1 hour
4.5 hours
13 hours
100 hours
To become fully
charged when the
cell is discharged
8 hours
45 hours
150 hours
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