It couldn’t be easier to change the battery in your FA20/FT40/FT60/FT80 and RCX3. This set includes 4 x sealing rings (to ensure your device keeps its water tight integrity) for easy and quick replacement. The sealing ring is not required for the RCX3.

For most of Polar products the battery is inserted at the factory. The actual life of the first battery once the product is in your possession can therefore feel shorter than the estimated.

Battery life time depends highly on how much you use the product. For estimated average battery life of your Polar product, please refer to product user manual.


It couldn't be easier to change the battery in your Polar product.  This includes  4 x sealing rings only (no battery cap) for easy and quick replacement.




For most of Polar products the battery is inserted at the factory. The actual life of the first battery once the product is in your possession can therefore feel shorter than the estimated.
It's very easy to change the battery in your Polar product. 
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.


Please note that the estimated delivery times generated by eBay are estimated. They are not guaranteed delivery times. and should not be taken as such.