There will be this situation, this is because the power is low, not in the normal charging.
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The Bluetooth charging bin has been flashing red, generally the battery is very low, the charging is very slow, half an hour after the battery is high, it will not flash red, normal charging.
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If it keeps flashing for a long time, the headset battery may be broken. There are earphones in the battery compartment, and the indicator indicates the earphone power level and the charging status of the earphone. Bluetooth headset charging precautions Select the right charger.