Casio 3145 Manual page 94

Charging Guide
After a full charge, timekeeping remains enabled for up to about five months.
• The following table shows the amount of time the watch needs to be
exposed to light each day in order to generate enough power for normal
daily operations.
Exposure Level (Brightness)
Outdoor Sunlight (50,000 lux)
Sunlight Through a Window (10,000 lux)
Daylight Through a Window on a Cloudy Day (5,000 lux)
Indoor Fluorescent Lighting (500 lux)
• For details about the battery operating time and daily operating conditions,
see the "Power Supply" section of the Specifications (page E-125).
• Stable operation is promoted by frequent exposure to light.
E-92
Approximate
Exposure Time
5 minutes
24 minutes
48 minutes
8 hours