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John, Engineer and electronic enthusiast for more than 12 years.
Category: Consumer Electronics
Satisfied Customers: 227
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I just changed the battery in my heart rate monitor but it

Customer Question

I just changed the battery in my heart rate monitor but it isn't registering on my 620
JA: What's the make/model of your GPS unit? How old is it?
Customer: I purchased the 620 and heart strap in 2015
JA: What happened right before this popped up?
Customer: I was getting a message on my 620 that the battery on the heart rate monitor was low
JA: What troubleshooting have you tried?
Customer: none I wasn't sure what to do
JA: Anything else you want the gps expert to know before I connect you?
Customer: no
Submitted: 11 months ago.
Category: Consumer Electronics
Expert:  Russell H. replied 11 months ago.

Hi, thank you for contacting My name is Russell. I will do my best to provide the right answer to your question.

I think that, if you have replaced the rechargeable battery in your heart rate monitor, you will need to charge it up for at least 6 hours, before trying to use it.

Rechargeable batteries that have sat upon a shelf waiting to be bought, have that reluctant quality, in many cases, that require their initial recharge be prolonged, even if the charger says they are charged long before the 6 hours are up.

Try it.

Let me know how it turns out, please. Thanks!