FAQs
Battery Empty in The Polar Heart Rate Sensor
The following may indicate that your heart rate sensor battery needs replacing:
- training computer does not show heart rate reading
- heart rate reading is erratic or stays unchanged for a long time
- heart symbol does not blink.
For information on possible sources for transmission interference, see Abnormal heart rate readings during the exercise.
When changing the battery of your training computer at Polar Service Center, have your heart rate sensor battery checked as well.1. Polar heart rate sensors with textile strap
Average battery lifetime of a heart rate sensors can be found in the product user manual.
Change the heart rate sensor's battery yourself or contact an authorized Polar Service Center or the local Polar distributor to have it changed for you.
If you prefer to change the battery yourself, see the instruction video for H7 and WearLink or H1/H2/H3 or find instructions from the corresponding user manual.
If your heart rate sensor is under warranty, we recommend that the battery be changed by a Polar Service Center. With good care your heart rate sensor lasts longer. Washing the heart rate sensor regularly ensures reliable measurement and maximizes its life span. Find product-specific care and maintenance instructions here.
2. Polar T31 and T31C Transmitters
The average battery lifetime of Polar T31 and T31C Transmitter is 2500 hours of use.
When the battery dies, you will need to replace the whole heart rate sensor (structure of the transmitter is sealed). Find nearest Polar retailer from Polar Service Finder.
With good care your T31/T31C Transmitter last longer. Washing the heart rate sensor regularly and never storing it wet ensures reliable measurement and maximizes its life span. Please see detailed care and maintenance instructions here.
Do not dispose of this product as unsorted municipal waste. To minimize possible effects of waste on the environment, please follow local waste disposal regulations and, where possible, utilize separate collection of electronic devices.If you purchase a heart rate sensor as an accessory, see compatible training computers here: Compatibility between Polar training computers and heart rate sensors
