Charging the battery

How to charge the battery

Expose the dial to light to charge the watch.

To ensure optimal performance of the watch, make sure that the watch is kept sufficiently charged at all times.

Under the following situations, the energy of the watch is likely to be depleted, resulting in stoppage of the watch:

The watch is concealed under a sleeve.

The watch is used or stored under conditions where it cannot be exposed to light for a long time.

Be careful to make sure that the watch does not get hot when it is charging. (The operating temperature range is -10°C to +60°C.)

When you first start using the watch or starting it after it stopped due to a lack of charge, charge the watch sufficiently using the table on Guide to charging times as a guide.

Guide to charging times

Charge the watch using the times below as a guide.

Illuminance lx (LUX)	Light source	Condition (Example)	Time required for fully charging the watch	Time required for charging the watch to start moving at one-second intervals	Time required for charging the watch to last for 1 day
700	Fluorescent light	General offices	-	60 hours	2.5 hours
3,000	Fluorescent light	30 W 20 cm	110 hours	13 hours	33 minutes
10,000	Fluorescent light	30 W 5 cm	30 hours	3.5 hours	9 minutes
10,000	Sunlight	Cloudy day	30 hours	3.5 hours	9 minutes
100,000	Sunlight	Sunny day (Under the direct sunlight on a summer day)	5 hours	36 minutes	2 minutes

The figures of “Time required for charging the watch to start moving at one-second intervals” are estimations of time required to charge the stopped watch by exposing it to light until it moves at steady one-second intervals. Even if the watch is partially charged for a shorter period, the watch will resume one-second interval movement. However, it may shortly return to two-second interval movement. Use the charging time in this column as a rough guide for sufficient charging time.

The required charging time slightly varies depending on the model of the watch.