Polar F 4, going nuts

amymeenieminymo
amymeenieminymo Posts: 2,394 Member
edited December 2024 in Fitness and Exercise
I've had my Polar F4 for about two or three years now and suddenly today it acts weird. It kept shutting off once I reached my supposed max heart rate (even though it was a different heart rate each time). Had anyone had this happen? Do I need a new battery?
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