Time Required For Charging - Citizen Eco-Drive b740 Instruction Manual

3. TIME REQUIRED FOR CHARGING

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 (7-7/8 inches)
from a fluorescent
lamp (30 W)
Interior lighting
24
Illuminance
To work for one
(lx)
100,000
10,000
3,000
500
Charging time (approx.)
To start working
normally when the
day
cell is discharged
2 min 45 min
4 min
16 min 2 hrs 30 min
2 hrs
To become fully
charged when the cell
is discharged
1 hr
16 hrs
2 hrs 30 min
5 hrs
18 hrs
—