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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
ProSense 307:
8 to 16 hours
ProSense 347/367:
18 to 36 hours
ProSense 307:
10 to 20 hours
ProSense 347/367:
21 to 42 hours
ProSense 307:
12 to 24 hours
ProSense 347/367:
25 to 50 hours
Settings used
Update Frequency: Per Second
Meas. HR setting: On
Update Frequency: Per Second or Wrist turn
Meas. HR setting: On or Off
Update Frequency: Wrist turn
Meas. HR setting: Off
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