Module No. 5544

Solar 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 the 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

Checking the Charge Level

Immediately after you press (C) to return to the Timekeeping Mode, the mode hand will indicate the battery charge level. After a short while, the mode hand will indicate the current day of the week.

5544_09_BO

Good (high charge)

Good (medium charge)

Low Battery

Remaining Charge and Dead Battery

You can determine if the charge level is low by checking the hand movement. Functions become disabled as battery power goes low.

Low Battery Power

The second hand jumps at two-second intervals.

batt_hand_2sec_BK_N02

Dead Battery

All hands and the day indicator are stopped.

batt_all_hands_0sec_BK_N02

Charging Time Guidelines

The table below shows guidelines for approximate charging times.

Required Charging Time for 1-day Use

Light Level (Lux)

Approximate Charging Time

50,000

8 minutes

10,000

30 minutes

5,000

48 minutes

500

8 hours

Time Required to Achieve Next Charge Level

  • Sunny day, outdoors (50,000 lux)

Dead battery arrowR Medium charge

2 hours

Medium charge arrowR High charge

17 hours

High charge arrowR Full charge

5 hours

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

Dead battery arrowR Medium charge

5 hours

Medium charge arrowR High charge

62 hours

High charge arrowR Full charge

17 hours

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

Dead battery arrowR Medium charge

8 hours

Medium charge arrowR High charge

100 hours

High charge arrowR Full charge

27 hours

  • Indoor fluorescent lighting (500 lux)

Dead battery arrowR Medium charge

87 hours

Medium charge arrowR High charge

-

High charge arrowR Full charge

-

Power Saving

Leaving the watch in a dark location for about one hour between the hours of 10 p.m. and 5:50 a.m. will cause the second hand to stop, and the watch to enter Level 1 power saving. If the watch is left in this condition for six or seven days, all hands will stop and the watch will enter Level 2 power saving.

Level 1:

Basic timekeeping functions are operational.

Level 2:

Only the day indicator is operational.

Recovering from Power Saving Operation

Press any button, perform a crown operation, or place the watch in a well-lit area to recover from power saving.