F990
Charging your watch
Charging time by environment
Below are the approximate charging times when exposing to light continuously. Please use this table as a reference only.
- Exposing to direct sunlight is recommended to charge your watch.
A fluorescent lamp or interior lighting does not have sufficient illumination to charge the rechargeable cell efficiently.
Outdoors (sunny), Illuminance 100 000 lx
| To work for one day | 4 minutes |
| To start working normally when the cell is discharged | 5.5 hours |
| To become fully charged when the cell is discharged | 50 hours |
Outdoors (cloudy), Illuminance 10 000 lx
| To work for one day | 25 minutes |
| To start working normally when the cell is discharged | 40 hours |
| To become fully charged when the cell is discharged | 270 hours |
70 cm (20-1/2 inches) away from a fluorescent lamp (30W), Illuminance 3 000 lx
| To work for one day | 1.5 hours |
| To start working normally when the cell is discharged | 150 hours |
| To become fully charged when the cell is discharged | – |
Interior lighting, Illuminance 500 lx
| To work for one day | 8 hours |
| To start working normally when the cell is discharged | – |
| To become fully charged when the cell is discharged | – |
Cal. No. F990
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