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and therefore it should not be used to obtain data under water. Do not push the buttons
under water.
NOTE: Large amounts of water or dirt under the cover of Suunto M9 may disturb the
satellite signal reception.
1.4 CHARGING THE BATTERY
Suunto M9 is equipped with an internal rechargeable battery. You can recharge the
battery approximately 500 times. The life expectancy of a single charge depends on
the use of the GPS, Compass and data storage functions. When the battery level
indicator on the display reaches the red zone, the battery voltage is low. When this
occurs, you should recharge the battery. However, extremely cold weather af-
fects the battery voltage even when the battery is still fully opera-
tional.
If the battery warning indicator is activated in tem-
peratures above 10°C (50°F), recharge the bat-
tery.
Do not attempt to change the battery, as this will
void warranty. Take the Suunto M9 to an author-
ized Suunto dealer for a battery change.
You can charge the battery with either 110V or
220 V mains charger (depending on the area of
purchase), with a car cigarette lighter charger
(optional) or with a 9 V battery.
To charge the battery:
1. Place Suunto M9 on the docking station with the
display facing up.
2. Plug the charger in the docking station. Plug the
charger in an electric outlet.
3. When the battery indicator shows a full battery, dis-
connect the charger from the electric outlet. Suunto
M9 is now ready for use.
NOTE: Heavy use of the GPS, backlight and compass
will significantly reduce the battery life.