How do I determine how much power is left on the battery?

• The battery icon on your device screen displays the remaining level of power in the battery.

  When the battery is low, you see this screen:
  

  (Press any button to return to the Time screen.)

  When the battery is too low, the screen may go blank.

  Caution:
  Charge your device at least once every 6 months when you are not using the device; long-term storage of the device with a low battery may degrade battery performance.

  The operating time for the battery varies depending on the device settings you are using, as described in the tables here.

  Note: The Light setting is Off in all of the estimates shown.

  Continuous workout time left (approximate)

  Battery icon	Operating time	Settings used
  	ProSense 307: 8 to 16 hours ProSense 347/367: 18 to 36 hours	Update Frequency: Per Second Meas. HR setting: On
  	ProSense 307: 10 to 20 hours ProSense 347/367: 21 to 42 hours	Update Frequency: Per Second or Wrist turn Meas. HR setting: On or Off
  	ProSense 307: 12 to 24 hours ProSense 347/367: 25 to 50 hours	Update Frequency: Wrist turn Meas. HR setting: Off
  	ProSense 307: 3 to 8 hours ProSense 347/367: 7 to 18 hours	Update Frequency: Per Second Meas. HR setting: On
  	ProSense 307: 4 to 10 hours ProSense 347/367: 8 to 21 hours	Update Frequency: Per Second or Wrist turn Meas. HR setting: On or Off
  	ProSense 307: 5 to 12 hours ProSense 347/367: 10 to 25 hours	Update Frequency: Wrist turn Meas. HR setting: Off
  	ProSense 307: 1.5 to 3 hours ProSense 347/367: 3.5 to 7 hours	Update Frequency: Per Second Meas. HR setting: On
  	ProSense 307: 2 to 4 hours ProSense 347/367: 4 to 8 hours	Update Frequency: Per Second or Wrist turn Meas. HR setting: On or Off
  	ProSense 307: 2.5 to 5 hours ProSense 347/367: 5 to 10 hours	Update Frequency: Wrist turn Meas. HR setting: Off
  	ProSense 307: 0 to 1.5 hours ProSense 347/367: 0 to 3.5 hours	Update Frequency: Per Second Meas. HR setting: On
  	ProSense 307: 0 to 2 hours ProSense 347/367: 0 to 4 hours	Update Frequency: Per Second or Wrist turn Meas. HR setting: On or Off
  	ProSense 307: 0 to 2.5 hours ProSense 347/367: 0 to 5 hours	Update Frequency: Wrist turn Meas. HR setting: Off

  Continuous time display left; approximate

  Setting	30 days	7 days	5 days
  Daily Activity Tracking	Off	On (Meas. HR setting: Auto)	On (Meas. HR setting: Continuous)
  Auto Sleep Mode	On	On	On
  Auto Search	Off	Off	Off
  Bluetooth	Off	On	On

  Note: Operation time also varies depending on the operating environment's effects on GPS reception.

  Related concepts
  Battery Life
  Related references
  Solutions to Watch Charging Problems