Why does when ever I put in my charger it says assessery not supported

Is the cable an Apple MFI/genuine or a knockoff? The MFI/Apple Lightning cables have a TI authentication chip not present in the knockoff. They use a resistor to emulate the authentic resistance the devices expect from the TI chip to “trick” the device. It’s a legal thing since copying the TI chip can get them into trouble, but a emulated pullup load with a resistor is legally safe.

The problem with these emulated pullup cables is it’s a short term solution as it only tells the phone what it likes to hear about the resistance and NOTHING ELSE. In addition, the TI chip is software detectable so you run into issues like this with the fake cables all the time. Both the Apple 1st party and MFI cables have the TI chip as Apple sells them the head with the part in the MFI program - which is why they work. They can’t authenticate beyond spoofing the correct resistance and the devices shut them down because they fail every other authentication test.

Don’t use cheap junk - get a MFI cable at the bare minimum. The knockoffs kill devices since Apple puts more trust into the cable with Lightning, rather then the device. There’s almost no onboard protection in the device, since the cable is supposed to self regulate unlike 30-pin where they had no way to trust the cable since it was open season to anyone as there was no authentication.