HRM SLOWLY DYING...MAYBE

For a few weeks now my HRM has been acting up. Sometimes it will pick up my heart rate. Sometimes it won't. Sometimes it'll say my HR is over 200 when I'm resting, then other times it'll say my HR is at like 38. My HRM is on crack. I don't know if it's simply time to change the battery or if it's taking a sh**.

Thoughts?

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