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18 Forerunner 210 Owner’s Manual
Appendix
About the Battery
WARNING
This product contains a lithium-ion
battery. See the Important Safety and
Product Information guide in the
product box for product warnings and
other important information.
Forerunner Battery Life
Battery
Life*
Forerunner Use
1 week You are training for 45
minutes per day with
GPS. The Forerunner is in
power save mode for the
remaining time.
Up to 3
weeks
You are using the
Forerunner in power save
mode the entire time.
Up to 8 hours You are training with GPS
the entire time.
*The actual battery life of a fully
charged battery depends on how much
time you use GPS, the backlight,
and power save mode. Exposure to
extremely cold temperatures also
reduces battery life.
Power Save
After a period of inactivity, the
Forerunner goes into power save mode.
The Forerunner displays the time and
date, but does not connect with your
ANT+ accessories or use GPS. You can
press page to exit power save mode.
Charging the Forerunner
NOTICE
To prevent corrosion, thoroughly dry
the contacts and the surrounding area
before charging or connecting to a
computer.
The Forerunner will not charge when
the battery is outside the temperature
range of 41°F–104°F (5°C–40°C).
1. Plug the USB end of the cable into
the AC adapter.