Polar Electro Running Sports RS100 User Manual page 53

...the low battery symbol appears?
Usually the first sign of an expired battery is the low battery
indicator on the display. For further information, see page 49.
Note: Due to cold conditions the low battery indicator may appear,
but the indicator disappears when you return to a normal
temperature.
...the display is blank?
The running computer is in battery saving mode when it is
dispatched from the factory. To activate it, press the Red button
twice. The Basic Settings starts. For further information, see page 8.
Alternatively the battery may be dead (see the next question for
further instructions).
...the battery of the wrist unit must be replaced?
We recommend having all service done by an authorized Polar
Service Center. This is especially necessary to ensure that the
guarantee remains valid and is not affected by incorrect repair
procedures performed by an unauthorized agent. Polar Service will
test your wrist unit for water resistance after battery replacement
and make a full periodic check of the complete running computer
set.
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