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How to get the battery out of this heart rate monitor? I can't even fit a paper between the battery and the case : r/howto
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Amazon.com: HQRP 4-Pack Lithium Battery Compatible with Polar FT40 FT40M H7 H10 Heart Rate Monitor FT4O FT-40 FT-40M : Electronics
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Amazon.com: Heart Rate Monitor Soft Strap Replacement | Universal Replacement for Mo-Fit, Most Garmin, Wahoo Tickr and Polar H7 HRM Transmitters (NOT for MYZONE) : Electronics
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