MyKronoz ZeBuds Mode D'emploi page 5

LED INFORMATION
There are 3 LED indicators in the charging case to indicate its built-in battery level.
3 LEDs ON = between 75% and 100%
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2 LEDs ON = between 25% and 75%
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1 LED ON = below 25% and requires your attention
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LED OFF = 0% battery
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or or