How much does the display brightness setting affect the battery life of the Suunto EON Core?

How much does the display brightness setting affect the battery life of the Suunto EON Core?

The Suunto EON Core default brightness is 50%.
Increasing or decreasing the bightness can, accordingly, reduce or extend the battery life by approximately 30%. This is only a rough estimate as other factors, such as temperature, can also affect battery life.

See also the Suunto EON Core user guide sections:
Display brightness
Technical specifications - Battery

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Suunto EON Core