Battery levels
You can check how much charge remains from the battery icon below the time display.
Battery icon and standard usage times
Usage function
GPS measuring
5 to 10 hours
2 to 5 hours
1 to 2 hours
0 to 1 hour
Estimated battery life of time display operation only (no GPS measuring)
Usage function
Maximum operation
time
*2
Meas. Activity is disabled, AUTO SLEEP is enabled
*1
, Bluetooth is disabled,
AUTO SEARCH is disabled
30 days
Meas. Activity is enabled, AUTO SLEEP is enabled
*1
, Bluetooth is enabled,
AUTO SEARCH is disabled
7 days
*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.
Note
Even if the battery runs out, measurement data is stored in the main memory.
c
Important
Nothing will appear in the screen when the battery level is low. If the device is left for a long time with a low battery,
the performance of the rechargeable battery will deteriorate.
Make sure you charge the device at least once every
six months
even when it is not being used.
J-307 User Manual
Setup
24
