Philips SmartSleep Snoring Relief Band Mode D'emploi page 11

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Battery fully charged
When the battery is fully charged, the battery
indicator lights up white continuously and
switches off automatically after 30 minutes.
Quick charge
When the battery is low or empty, you can
quickly charge the sensor for 1 hour. This
allows you to use the sensor during one
sleeping session.
Battery low
When the battery is almost empty, the battery
indicator blinks orange. Charge the sensor
when the battery low indication lights up
before using it.
Battery empty
When the battery is empty, the battery
indicator blinks orange quickly.