After I replaced the battery yesterday my HRM pro is really weird. It connects immediately to my Edge 530 and tells me that I at least got a pulse... It reads around 70 from start and stays there for the first 15 min. It should at least start to increase to above 100 quite quick. After a while it starts to display my correct pulse when I compare with my Fenix 6x. Then it starts to drop again to 70 and jumps up and down, see the graph below.
Yes, my strap is wet. Before I replaced it everything worked well. When I replaced the battery everything looked fine inside, no moist or any visible damages.I tried two different batteries with same result. I have replaced the battery two times before without issues. I'm aware of the o ring issue, but it seemed to be fine. Since it didn't have this behavior before the battery replacement I don't think the gasket is the problem. I even tried to delete it and pair it again.
Someone with the similar problem?
