The general voltage of the charger is 5V. The voltage output provided by the battery to the normal working condition of the headset when the Bluetooth headset is working. It's usually around 5V.
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The charger power supply of the Bluetooth headset refers to the external power supply voltage required when charging the rechargeable battery of the Bluetooth headset. Generally, the battery is supplemented by 220V mains transformer to 5V direct current.
The charging voltage of Bluetooth headsets is generally 5V.
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Mainly look at the current, the charging current of the Bluetooth headset is generally better at 500-700MA, not more than 1A, too high can also be used, that is, the battery is not very good, it is best to fix a 500-700MA charging head, if mixed, the battery life or single use time has an impact.
The voltage of the battery is 3.7V, and the real charger of the Bluetooth headset is generally integrated inside, the outside is called the power supply, and the general output voltage is 5V.