About the error message "This accessory may not be supported by device":
The message would appear if you were using an unauthorized wall charger or in poor contact, but even if you are using an original accessory, the error can also happen for the firmware problem with iOS.
After analysis, the causes of this problem may be the following:
Device lightning port contains impurities such as fiber and debris, resulting in poor contact.
The voltage of the wall charger is too low or unstable, resulting in insufficient power supply.
The lightning end is corroded/stained, resulting in poor contact.
Circuit logic problems/system problems with charging equipment.
The chip or mainboard of the cable is damaged.
You can try the following solutions:
You can use a pushpin to clean out the pocket lint or debris from the charging port.
Wipe the Lightning end with a tissue to remove dirt and oxidation marks on the lightning end.
Use the original charger or MFi authorized charger, because some laptop USB output ports may have insufficient power output.
3A Fast-Charging
- Use the USB-C PD charger to provide high-speed charging up to 3A (max), which can save you more than 1 hour compared with the original 5W charger.
One-for-More
- Use the C to Lightning cable with your USB-C PD Charger (including 18W, 20W, 30W, 45W, 61W or 87W USB-C Power Adapter) to charge your iOS device.
Safe and Reliable
- UGREEN USB C to Lightning cable made from original chips provides a secure and stable voltage.