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External sensor and battery usage

Which way will consume more battery energy, the first is if I use an external heart rate monitor on ant+ with the heart rate monitor turned off on the watch, the second is just a heart rate monitor on the watch without any sensors connected. Everything is in GPS mode when jogging, for example.

0 ben.hartley over 2 years ago

Probably the external HR monitor, but I think the difference is negligible. ANT+ is a low power protocol made for fitness devices. With the external HR monitor you're likely to have better HR accuracy, so the slightly increased power usage may be worth it for that alone.