Generally, AirPods will have a prompt tone when the battery is low, the first prompt tone of AirPods is to remind the current battery of the headphones is less than 15%, and the user needs to charge the headphones as soon as possible.
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The second tone indicates that the headset is out of battery and may shut down soon. In addition, it may be the reason why airpods Bluetooth earphones repeatedly try to connect when connecting, for example, the Bluetooth earphone connection is always unsuccessful, and after repeated connection, the connection prompt tone will ring from time to time with the connection or disconnection.