In recent years Apple increased the accuracy of their OHRMs & Polar increased the running time of the Verity Sense – so what now

When Polar released the Polar OH1 the battery running time was about 8 hours. To use this device 24 * 7 requires 3 fully charged Polar OH1. Then Polar released the Polar OH1 successor Verity Sense. The battery running time of the Verity Sense was longer than that of the Polar OH1, but shorter than …