External HRM not disconnecting?

Former Member
Former Member

I have an external chest strap HRM that I use when mountain biking. Typically when I load the mountain bike activity widget it connects, the HRM beeps, and away we go. Recently I have noticed on drives home after the activity is completed that my HRM has been beeping like it keeps connecting/disconnecting with the watch. I have killed 2 batteries in the HRM in the last 6 weeks and the watch has been draining significantly faster (over 20% yesterday with no GPS or music use). 

Any suggestions outside of adding and removing the external sensor every ride?

  • Try downgrading to ANT BLE 5.04, this solves my drain problem, while staying on 12.00 firmware. I suspect this change is behind the 'recent' behavious change you report.

    I suspect ANT 6.06 keeps connections live somehow which was causing rapid power drain.

  • A Garmin HRM does not beep. Is this a 3rd party strap? Your watch should only seek to connect to a watch when an activity is open or you are in Sensors and Accessories.

    Is your activity stopped and saved?

    Is your watch back to the watch face on your drive home?

    Do you have the alert set for phone connect/disconnect?