When the iPhone starts fast charging (fast charging), no prompts or information will be displayed on the screen, which is almost the same as the charging status of ordinary iPhones. Therefore, it is impossible to directly judge whether the current iPhone charging is fast charging or normal charging through the iOS system status or sound, but you can understand it by identifying the iPhone fast charging method later.

If you want to know whether the iPhone is fast charging, you can use the following five methods to determine whether the iPhone is fast charging:

· Check the iPhone model, PD fast charging head and charging conditions

· Check that the iPhone is fully charged to 50% in 30 minutes

· Use current testing instruments or accessories

· Purchase charger accessories with current display

· Use iPhone current detection APP to determine

Method 1. Check the iPhone model, PD fast charging head and charging conditions

Many people are curious about how to achieve iPhone fast charging conditions? As long as the following seven important key conditions are met, the iPhone fast charging can be successfully triggered, namely:

1. USB-C PD fast charging head (20 watts or higher wattage, note that the charging port must be USB-C).

2. Lightning to USB-C fast charging cable (traditional USB-A to Lightning does not support fast charging).

3. iPhone will only be in high-speed fast charging state when the battery level is less than 50% (the charging efficiency will gradually decline from 50% to 80% until it starts to trickle charge and slow charge at 80%).

4. The battery temperature on the back of the iPhone cannot be too high (overheating will automatically reduce the voltage).

5. All iPhone 8 or iPhone X (inclusive) and above models support fast charging.

6. iPhone 13 Pro Max (inclusive) and above models support 27W fast charging.

7. iPhone 13 / Pro (inclusive) and below models all support 20W fast charging (for details, please refer to the fast charging wattage later).

iPhone fast charging speed

If you want to know the fast charging wattage of each iPhone, you can find out from the following charging efficiency table. Starting from the iPhone 11 series, it supports 20W fast charging heads, and until the iPhone 13 Pro series (including) subsequent models, the fast charging power can reach up to 23W~24W. If it is the iPhone 13 Pro Max series or new models, the fast charging wattage can reach up to 27W

Method 2. Check if the iPhone is fully charged to 50% in 30 minutes

The easiest way to know whether the iPhone has activated fast charging is to consume the phone power to less than 20%, and then charge the iPhone with a PD fast charging head, and use the iOS built-in "Clock App" to count down for 30 minutes. Check whether it can be fully charged to 50% within half an hour to determine whether the iPhone has activated fast charging.