Module No. 3540

Charging

This watch runs on power supplied from a rechargeable (secondary) battery that is charged by a solar panel. The solar panel is integrated into the face of the watch, and power is generated whenever the face is exposed to light.

Charging the Watch

When you are not wearing the watch, put it in a location where it is exposed to bright light.

WAT_SOLAR_01

While you are wearing the watch, make sure that its face (solar panel) is not blocked from light by the sleeve of your clothing. Power generation efficiency is reduced even when the face of the watch is blocked only partially.

WAT_SOLAR_caps_02

Important!

Some light sources and environments can cause the watch to become extremely hot during charging, which creates the risk of burn injury and damage to internal watch components.
Avoid charging the watch under conditions like the ones described below, where the temperatures may exceed 60 °C (140 °F).

On the dashboard of a vehicle parked in the sun

Near incandescent lamps, camera lights, halogen lamps, or other sources of heat

In locations exposed to direct sunlight for long periods and other hot locations

Low Battery

A low battery will cause [LOW] to flash and will disable the functions below.

Time signal reception

Illumination

Sounds (alarm, etc.)

Connection with a phone

3543_05_Bat_Intro

If the charge level drops even further, [CHG] will flash. If this happens, all functions are disabled.

3539_06_Bat_Intro

Dead Battery

The digital display will go blank if the battery goes dead. Memory data is lost, and watch settings are returned to their initial factory defaults.

Important!

Should the battery go low or go dead, expose the face (solar panel) to light as soon as possible.

Exposing the watch to light while its battery is dead will cause [CHG] to start flashing. Keep the watch exposed to light until the current time appears on the display.

Note

If [R] is flashing, it means that all functions, except for timekeeping, are disabled due to high momentary battery power consumption.

3543_07_Bat_Intro

Charging Time Guidelines

The table below shows guidelines for approximate charging times.

Charging Times Required for 1 Day of Operation

Light Level (Lux)

Approximate Charging Time

50,000

8 minutes

10,000

30 minutes

5,000

48 minutes

500

8 hours

Charge Recovery Times

Sunny day, outdoors (50,000 lux)

Dead battery arrowR Medium charge

3 hours

Medium charge arrowR High charge

36 hours

High charge arrowR Full charge

10 hours

Sunny day, near a window (10,000 lux)

Dead battery arrowR Medium charge

10 hours

Medium charge arrowR High charge

134 hours

High charge arrowR Full charge

36 hours

Overcast day, near a window (5,000 lux)

Dead battery arrowR Medium charge

16 hours

Medium charge arrowR High charge

217 hours

High charge arrowR Full charge

58 hours

Indoor fluorescent lighting (500 lux)

Dead battery arrowR Medium charge

211 hours

Medium charge arrowR High charge

-

High charge arrowR Full charge

-

Note

Actual charging time depends on the charging environment, watch settings, and other factors.

Power Saving Function

Leaving the watch in a dark location for about one hour between the hours of 10 p.m. and 6 a.m. will cause the display to go blank, and the watch to enter Level 1 power saving. If the watch is left in this condition for six or seven days, the watch will enter Level 2 power saving.

Power Saving Level 1:

Digital display goes blank to save power. The watch can connect with a phone at this level.

Power Saving Level 2:

Digital display goes blank to save power. All functions are disabled.

Recovering from Power Saving Operation

Use one of the operations below to exit power saving.

Press any button.

Move the watch to a bright location.

Trigger auto light by angling the watch towards your face.

Note

The watch will not enter power saving in the cases below.

Alarm Mode

While in the Stopwatch Mode

While in the Timer Mode

You can enable or disable Power Saving.

Note that the watch also may enter power saving if its face is blocked from light by your sleeve while you are wearing it.

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