What is fast charging on the iPhone?
Fast charging gives you a quick and convenient way to recharge your iPhone 8 or later. Your iPhone fast charges up to 50 percent in 30 minutes when you use an Apple USB-C to Lightning cable and one of these adapters:
How do I know if my iPad is fast charging?
Here’s one example: Diymore USB Charger Doctor Current Voltage Charging Detector Battery Voltmeter Ammeter Multimeter USB Tester Mobile Power Panel Monitor Gauge DC LED Display - - Amazon.com If the charge current is above 1 A, the iPad is definitely fast charging.
Why does my iPhone take so long to charge after charging?
The iPhones are hard-coded in a way that it stops fast charging once the battery reaches 80%. Fast charge only starts when the capacity range falls anywhere 0% and 79%. There is no need to obtain an adapter stronger than 20W as iPhones can only sustain a 20W charge.
How do I Reset my iPhone after fast charging it?
Keep in mind that if you don't hear the second chime while using the right cable and adapter for fast-charging, you may still be able to fast charge your iPhone. You can reset by unplugging your iPhone from the charger and waiting at least 30 seconds. After 30 seconds, try plugging the cord into your iPhone again and it should chime twice.