A fast charger can charge your headphones, but it won't damage them. Because the charger that meets the safety standard will automatically identify the power required by the device, it will not cause damage to the device. At the same time, the current Bluetooth headset will have a charging IC chip inside to manage the entire charging process, playing the role of overcharge protection, overvoltage protection, overheating protection and so on. Therefore, it is safe to use a fast charger to charge a Bluetooth headset.
The charging method of the fast charging headset may cause damage to the charger, because this charging method may cause the circuit and components of the charger to be impacted by too high voltage and current, which will cause the circuit to burn out, the charger failure and other problems. Therefore, in order to protect the charger, it is recommended to use a slow charging mode to avoid excessive voltage and current to cause damage to the charger.