How To Check If Your iPhone Is Fast Charging

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Are you looking to charge your iPhone faster? Do you want to know how to tell if your iPhone is fast charging? Then this blog post is here to help!

When it comes to charging your iPhone, fast charging can be incredibly helpful. Typically, it takes at least two hours for an iPhone 8 or later model to charge from 0-100%. With fast charging, however, you can get up to 50% battery in around 30 minutes!

To start fast charging your iPhone 8 or later models, all you need is an Apple USB-C to Lightning Cable and one of the following adapters: Apple 18W, 20W, 29W, 30W, 35W, 61W, 67W, 87W or 96W or 140W USB-C Power Adapter.

So how do you know if your iPhone is fast charging? You should hear two chimes coming from the phone when using a normal cable and adapter that come with a new iPhone box. The second chime should sound a second or two after the first chime. Additionally, if you look at the battery symbol on the phone’s screen while it’s plugged in and being charged, you should see a lightning bolt in its corner. This indicates that the device is being charged in fast charging mode.

If you still aren’t sure whether your device is fast charging or not, then head over to Settings > Battery > Battery Health and check if ‘Fast Charging’ is enabled. If not, then slide the switch next to ‘Optimized Battery Charging’ off.

And there we have it! Fast charging your iPhone doesn’t have to be complicated – just follow these steps and you’ll be ready for a full battery life in no time!

Identifying if an iPhone is Fast Charging

To tell if your iPhone is fast charging, you’ll want to listen for two chime noises after connecting it to a power source. If you hear two chimes, then your phone is in fast charging mode. If you only hear one chime, then your phone is charging at its normal rate. Additionally, you can check your device’s lock screen or notification center for the ‘Fast Charging’ message or lightning bolt icon to confirm it is in fast charging mode.

how to know if iphone is fast charging

Identifying Whether a Charger is Fast Charging

If you’re curious to know if your charger is a fast-charging one, it’s relatively easy to check. First, plug it into your device and look for the charging symbol. On many devices, a lightning bolt next to the symbol indicates that the device is using fast charging. You can also check the settings for “Fast charging” under the battery section. This will tell you whether or not your charger is providing fast charging capability to your device. If you don’t see any of these signs, then it’s likely that your charger does not support fast charging.

Activating Fast Charging on an iPhone

To activate fast charging on your iPhone, you will need to use an Apple-certified USB-C to Lightning cable, and at least a 20W USB-C power adapter or higher. To begin charging quickly, connect the USB-C end of the cable to the power adapter, then plug it into a wall outlet. Then connect the Lightning end of the cable to your iPhone. Your device should start charging faster than normal as soon as it’s connected. Additionally, you can disable a feature called Optimized Battery Charging by going to Settings > Battery > Battery Health and tapping the slider next to Optimized Battery Charging. This will allow your device to charge even faster.

The Benefits of Fast Charging an iPhone

Fast charging is a feature available on iPhone 8 and later models that allows you to charge your device up to 50 percent battery in around 30 minutes. To use this feature, you need an Apple USB-C to Lightning cable and one of the compatible power adapters (Apple 18W, 20W, 29W, 30W, 35W, 61W, 67W, 87W, or 96W, or 140W USB-C Power Adapter). This feature is very convenient for when you need a quick boost of power without having to wait hours for a full charge.

The Benefits of 20W Fast Charging

Yes, the 20W USB-C Power Adapter offers fast charging. It can provide up to 50 percent of an iPhone 8 battery in just 35 minutes, and it is optimized for the iPad Pro and iPad Air for optimal charging performance. Compatible with any USB-C-enabled device, the 20W USB-C Power Adapter is a great choice for fast, efficient charging at home, in the office, or on the go.

Enabling Fast Charging

To turn on fast charging, open the Settings app on your device and scroll down to the Battery and Device Care section. Tap on Battery and select More Battery Settings. From there, you can toggle either Fast Charging or Super Fast Charging to On. This will allow your device to charge faster when connected to a compatible charger.

Does Fast Charge Damage iPhone Battery?

No, fast charging does not damage your iPhone battery. In fact, it can actually help extend the life of your battery by reducing the number of complete charge cycles it has gone through. Fast charging works by increasing the amount of current flowing into the battery and allowing it to reach full charge in less time than with standard charging. During fast charging, your iPhone may get slightly warmer than when you are using standard charging, but this is not enough to cause any noticeable harm.

Accessing iPhone Charging Settings

The iPhone charging settings can be found by going to Settings > Battery > Battery Health & Charging. Here you will find the option to turn on Optimized Battery Charging, which helps prolong the lifespan of your battery by learning your charging routine and waiting to finish charging past 80% until you need to use it.

Activating Fast Charging on an iPhone 12

To activate fast charging on your iPhone 12, you will need to first purchase an Apple 20W USB-C charger, such as the 3.3 ft/1m MFi USB-C to lightening PD charging cable. Then, connect the USB-C end of the cable to the 20W charger and the lightning end of the cable to your iPhone 12. After that, make sure that you are using a wall outlet that is capable of providing at least 9V and 2A of power. Once everything is connected correctly, your iPhone 12 should be able to charge up to 50% in just 30 minutes.

The Benefits of Slow vs. Fast Charging an iPhone

It depends on the situation. For example, if you need to charge your iPhone quickly, a fast charger is best. It can usually charge an iPhone from 0-100% in an hour or less. On the other hand, if you’re just charging it overnight, a slow charger is better. It puts the least amount of stress on the battery and will take longer to fully charge, but that’s okay if you don’t need it right away. In either case, it’s important to use a good-quality charger that meets Apple’s safety standards for your device.

Troubleshooting Issues with iPhone Fast Charging

There are a few possible reasons why your iPhone isn’t fast charging. First, make sure you have a USB-C PD charger that supports USB Power Delivery. Next, check the USB cable and make sure it’s an Apple-certified cable that is designed for fast charging. Lastly, you may need to reset your charging system. To do this, unplug the phone from power for at least 10 seconds and then reconnect it. If none of these steps work, you may need to get your device serviced or replaced.


In conclusion, the iPhone is a great device with lots of features and capabilities. It offers fast charging technology when you use an Apple USB-C to Lightning cable and one of the compatible adapters, allowing you to charge your iPhone 8 and later up to 50 percent battery in around 30 minutes. Additionally, you can turn off the Optimized Battery Charging feature in your settings if you need to charge your device faster. With its powerful performance, great battery life, and fast charging capabilities, the iPhone is a great choice for anyone looking for a reliable phone that can keep up with their lifestyle.

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James Walker

James Walker has a deep passion for technology and is our in-house enthusiastic editor. He graduated from the School of Journalism and Mass Communication, and loves to test the latest gadgets and play with older software (something we’re still trying to figure out about himself). Hailing from Iowa, United States, James loves cats and is an avid hiker in his free time.