User manual
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Dry and store the strap and the connector separately to maximize the heart rate sensor battery lifetime. Keep
the heart rate sensor in a cool and dry place. To prevent snap oxidation, do not store the heart rate sensor wet
in non-breathing material, such as a sports bag. Do not expose the heart rate sensor to direct sunlight for
extended periods.
SERVICE
During the two-year guarantee/warranty period we recommend that you have service done by an authorized
Polar Service Center only. The warranty does not cover damage or consequential damage caused by service
not authorized by Polar Electro. For further information, see Limited International Polar Guarantee.
For contact information and all Polar Service Center addresses, visit www.polar.com/support and country-spe-
cific websites.
Register your Polar product at http://register.polar.fi/ to ensure we can keep improving our products and ser-
vices to better meet your needs.
The username for your Polar Account is always your email address. The same username and password are
valid for Polar product registration, Polar Flow web service and app, Polar discussion forum and newsletter
registration.
BATTERIES
The Polar M400 has an internal, rechargeable battery. Rechargeable batteries have a limited number of charge
cycles. You can charge and discharge the battery over 300 times before a notable decrease in its capacity.
The number of charge cycles also varies according to use and operating conditions. Do not charge the battery
when the M400 is wet.
At the end of the working life of the product Polar encourages you to minimize possible effects of waste on the
environment and human health by following local waste disposal regulations and, where possible, utilizing sep-
arate collection of electronic devices. Do not dispose of this product as unsorted municipal waste.
The Polar H7 heart rate sensor has a user changeable battery. To change the battery yourself, please follow
the instructions carefully as instructed in Changing Heart Rate Sensor Battery.
Keep the batteries away from children. If swallowed, contact a doctor immediately. Batteries should be dis-
posed of properly according to local regulations.
CHANGING HEART RATE SENSOR BATTERY
To change the battery of the heart rate sensor yourself, carefully follow the instructions below:
When changing the battery, make sure the sealing ring is not damaged, in which case you should replace it
with a new one. You can purchase the sealing ring/battery kits at well-equipped Polar retailers and authorized
Polar Services. In the USA and Canada, the additional sealing rings are available at authorized Polar Service
Centers. In the USA the sealing ring/battery kits are also available at www.shoppolar.com.