Polar HR Monitors with Coded Chest Straps
 

I have a CS200 and have had great luck with it for 1yr now. The past week or so, the HR has been above 200 most of the time. All else is the same -- using the same gel on the chest strap, good connections, etc.

Do I simply need to replace the 2025 battery in the chest strap? Or, is this something I need to contact Polar about?

bump

It isn't electronic interference given it is for an entire ride over hundreds of miles and I've reset the straps several times. And, I use gel on the strap. Hopefully, it is only the battery.