Module No. 3564
Power Saving
If power saving is enabled, the watch will turn off its display and enter Level 1 power saving if it is left unused for approximately 150 minutes between 10 p.m. and 6 a.m. If the watch is left in this condition for six or seven days, it will then 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.
Battery life (new battery)
Power Saving On (Worn 5 days a week, 6 hours per day, Power Saving Level 1, not worn two days a week):
Approximately 44 months
Power Saving Off:
Approximately 33 months
Recovering from Power Saving Operation
Use one of the operations below to exit power saving.
Press any button.
Wearing the watch
Note
Under the conditions below, the display does not change even if the power saving Level 1 conditions are met.
While in the Stopwatch Mode
While in the Timer Mode
When six to seven days elapse with the Stopwatch or Timer Mode currently displayed on the screen in the reset state, the watch enters the Level 2 power-saving state.
You can enable or disable Power Saving.
The watch may enter a power-saving state while you are wearing it if you do not move your arm.