Module No. 3553

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.

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.

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

The display panel may become black (or white, depending on the LCD type) under very high temperatures. This is temporary, and the display will return to normal at lower temperatures.

Checking the Charge Level

A display indicator shows the watch’s current charge level.

Charge Level 1: Good

All functions enabled.

Charge Level 2: Good

All functions enabled.

Charge Level 3: Low

[L] and [LOW] flash on the display and the functions below become disabled.

Time signal reception

Compass, altitude, barometric pressure/temperature measurements

Face illumination

Sounds (alarm, etc.)

Charge Level 4: Low

When the battery charge drops lower than Level 3, [CHG] starts to flash on the display and all functions become disabled.

Charge Level 5: Dead

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.

Note

When [H], [M], and [L] are all flashing on the display, it means that all functions are disabled due to momentary battery power consumption.

[H], [M], and [L] are flashing on the display.

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	5 minutes
10,000	24 minutes
5,000	48 minutes
500	8 hours

Charge Recovery Times

Sunny day, outdoors (50,000 lux)

Dead battery Medium charge	2 hours
Medium charge High charge	13 hours
High charge Full charge	4 hours

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

Dead battery Medium charge	6 hours
Medium charge High charge	66 hours
High charge Full charge	18 hours

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

Dead battery Medium charge	10 hours
Medium charge High charge	133 hours
High charge Full charge	36 hours

Indoor fluorescent lighting (500 lux)

Dead battery Medium charge	126 hours
Medium charge High charge	-
High charge 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.

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.

While in the Stopwatch Mode

While in the Timer Mode

While the barometric pressure change indicator is displayed

You can enable or disable Power Saving.

Configuring Power Saving Function Settings

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