armin.seiler9 months ago000I have mounted the old sensor on a newly purchased Polar chest strap. But something is not working (despite the new battery). Can anyone help me?Show in original language (German)Wern12289 months ago • purchased this product000purchased this productIs the Polar correctly paired with the mobile (may be lost after an update on the mobile)Show in original language (German)Commenttpiracer9 months ago • purchased this product000purchased this productMaybe the sensor is broken?That was the case for me.Show in original language (German)Comment