Battery Levels
The battery icon below the time display indicates the remaining charge in the battery. Charge the device as
necessary in accordance with usage conditions.
Estimated Continuous Workout Measuring Time
Battery level
indicator
Operating time
10 to 6 hours
6 to 4 hours
4 to 2 hours
2 to 0 hours
Estimated Continuous Time Display Duration
: ON
: OFF
: Not supported
Device usage state
(no workout measuring)
Maximum operation time
*2
30 days
2 days
4 days
Track Activity
Heart rate monitoring
(advanced)
(normal)
Auto Sleep
*1
Seconds Display
Auto Search
Bluetooth
®
*1
Auto Sleep is active for 14 hours per day (internal evaluation criteria).
*2
The operation time varies depending on the environment, which affects GPS reception, and device settings
such as backlight settings.
J-57 User Manual
Setup
22
