User`s guide

About the Battery
You can check how much charge remains from the battery icon below the time display.
Battery icon
Hours
remaining*
GPS On
HR Monitor Off
30 to 21 hours 21 to 12 hours 12 to 3 hours 3 to 0 hours
GPS On
HR Monitor On
26 to 18 hours 18 to 10 hours 10 to 2 hours 2 to 0 hours
* Standard hours during which you can use the Chronograph function while receiving a GPS signal.
Usage hours vary depending on the conditions (HR Monitor On, frequency the light turns on, and so on).
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Important:
Nothing is displayed when the battery is running out. 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.
Note:
Even if the battery runs out, measurement data is stored in the main memory.
SF-710/510/310 User's Guide
Preparing and Basic Operations
27