If the Bluetooth headset is charged with a fast charging head, there is no problem with charging for a short time, and there is no problem with charging one or two times, but remember to unplug it after it is fully charged. Using the fast charging head to charge the Bluetooth headset can not be charged for a long time, so it is full to dial this right. The Bluetooth headset is not much harm, because the fast charging head, when it charges, it will also determine whether the device has a fast charge.
If your Bluetooth headset is not fast charging, he determines that it is not fast charging, and it will be charged in ordinary charging mode. So it's not a bad thing.
The Bluetooth headset will not be broken with fast charging, because it will automatically power off when it is charged to enough power, and it will not charge, which is the same principle as the mobile phone.