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The LEDs of the case will turn on successively (white light).
The four white lights are on after being fully charged; when
the charging case is disconnected, the power indicator
light will go out after
Charging chase
When the battery voltage is lower than 3.3V, there will be a
prompt
tone of “battery low，please charge"", and the red light will
flash for 20s
once. When the battery voltage is lower than 3.0V, it will be
shut down
Low battery
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