My question is actually in the title but I ask because I looked at Amazon for fast chargers and there were some 36 watts for IPhone, Samsung, Huawei, etc and there was also support for QI charge and I heard and read the Schnellade techniques from Manufacturers do not support others that it is then charged normally with 1 ampere. How can that be, for example Samsung's Schnellade technology not supported by LG? Can someone tell me and can someone tell me whether it supports charging 18 watts or not and not comments like he doesn't care how much watts the power supply has, it draws as much as it needs to write
You can connect a stronger one. It doesn't matter to the iPhone, it only loads max. What it can do Everything else is blocked. The strong power supply is probably not working.
The higher charging current puts even more strain on your old battery (probably 4 - 6 years old) and limits the (remaining) service life.
