How To Tell If Iphone Is Fast Charging?

Forget using the traditional 5 Watt USB wall brick that comes with an iPhone. It is not enough to charge an iPhone 8, iPhone 8 Plus, or iPhone XS significantly faster.

You will either need a 7.5 Watt Qi wireless charger or a 10 Watt USB type C power adapter to fast charge your iPhone. For best results, it is strongly recommended that you take full advantage of the convenient fast charging function that is compatible with iPhone 2017 and later models. 

In this article, we will discuss almost everything you ever need to know about iPhone fast charging. So, what are we waiting for? Let’s jump in –

Does the iPhone fast charge work?

Okay, first thing first, we will start with whether fast charging is compatible with the iPhone or not. Although there is no official way to verify fast charging for your iPhone, you can take a look at the following considerations – 

  1. You don’t actually need an adapter of 20 Watt or more. The iPhone can only handle 20 Watt, so a more powerful adapter is useless. However, this is a good way to prepare for future charging needs if the upcoming iPhones require higher charging.
  1. Fast charging will only be activated when the battery level is between 0% and 79%. The iPhone automatically stops fast charging when the battery reaches 80%. 
  1. You can install a third-party application, such as Ampere, which will measure the current, voltage, and incoming charge. Obviously, you will have to make some modifications to troubleshoot if your charger is faulty or working as expected. You will notice something like below in the Ampere app –

Three are two things required to quickly charge the iPhone. They are – 

  1. A USB Type C to the Lightning cable. Just make sure it supports USB Power Delivery (USB-PD).
  2. A minimum 18 Watt power adapter is required although iPhone 12 and later models require a 20 Watt adapter.

Let’s get clear about iPhone fast charge

If you want to understand the whole iPhone fast charge process, you need to learn two factors. First, know the degrees of charging that are only applicable for iPhones. Second, the models that feature fast charge.

The degrees of charging for iPhones

Before we distinguish the difference between fast charge and faster charging, know the 5 degrees of charging that are applicable for iPhones. These degrees are defined based on the speed of charging.

Regular Wired ChargingRegular Wireless ChargingFaster Wired ChargingFaster Wireless ChargingFast Wired Charging
It is offered by the regular 5 Watt USB wall plug It is offered by a 5Watt Qi-compatible wireless chargerCan be acquired via an iPad power adapter that is of 10 Watt or 12 WattCan be acquired via an Apple-sanctioned 7.5W Qi charger (only on iOS 11.2 and higher)Can be acquired via a USB-C power adapter

Fast Charge Featured iPhones

Don’t confuse fast charging (currently the fastest wired charging standard for smartphones) with traditional faster charging that was also applicable for the older iPhone models. Although it requires a minimum 15W USB type C charger, fast charge is specifically featured on – 

  1. iPhone 12 Pro (Max)
  2. iPhone 12 Pro
  3. iPhone 12
  4. iPhone 12 Mini
  5. iPhone XS (Max)
  6. iPhone XR
  7. iPhone X
  8. iPhone 8
  9. iPhone 8 Plus
  10. iPad Pro 12.9-inch
  11. iPad Pro 11-inch
  12. iPad Pro 10.5-inch

Apple provides a dedicated USB power adapter for iPhone 8, iPhone 8 Plus, or iPhone XS. It allows you to charge the battery from 0% to 50% within 30 minutes. This type of fast charger is also available for iPad and Mac. 

Please Note: When the iPhone battery reaches 50%, the fast charging speed will gradually decrease to protect the battery. The speed difference between normal and fast charging will not exceed 50%, just as obvious as charging the iPhone when the battery is 50%. 

How to know if iPhone 12 is fast charging? 

Apple’s controversial decision not to provide a charger with the iPhone 12, iPhone 12 Mini, iPhone 12 Pro, and iPhone 12 Pro Max has caused some confusion about charging. Although all iPhone 12 models include a USB Type-C to lightning cable, you need to purchase an independent power adapter, which is capable of supporting fast charging.

How to know if an iPhone is charging fast in iOS 14? 

This is impossible because iOS 14 does not really indicate whether the phone is charging fast or not. In addition, it is not clear whether and when Apple will provide fast charging notifications to iOS 14 users. 

However, there is a way to check if your iPhone is fast charging on iOS 14.

  1. Discharge the iPhone battery to 0%. 
  2. Use a USB Type-C lightning cable to plug your iPhone into a compatible charger. 
  3. Now start counting how long it takes to charge from 0% to 50% as Apple claims that it will only take about 30 minutes through fast charging. 
  4. If your iPhone takes significantly longer than 30 minutes to charge at 50%, there may be a problem with the data cable or charger.

Rate of fast charge with various options

If we put the iPhone 8 Plus in sleep mode, the 39 Watt USB type C power adapter will take about one and a half hours to fully charge the phone. Where the 5 Watt power adapter will take more than three hours. So, it is almost double the time. 

With that being said, charging using the iPhone 8 Plus through a Macbook port using either a 12 Watt iPad charger or bus-powered USB 3.0 port will take more than 15 minutes to fully charge the phone if you would have charged the phone with a 30W USB type C port.

In other words, fast charging using a USB-C cable or 30 Watt charger is actually faster than using a USB 3.0 port on the desktop. It is also faster than using a 10/12 Watt iPad power adapter. Apple’s 87 Watt and 61 Watt chargers were introduced for the 13-inch and 15-inch MacBook Pro. There is no safety risk if you use any of them to charge your iPhone.  

This graph indicates the difference among various iPhone charging options – 

However, marginal improvements can be noticed if you are using a 61 Watt or 87 Watt charging brick. 

  • It takes 37 minutes to charge 50% using Apple’s 12 Watt USB power adapter
  • It takes 33 minutes to charge 50% using Apple’s 30 Watt USB-C power adapter 
  • It takes 29 minutes to charge 50% using Apple’s 61 Watt USB-C power adapter 

For those who want to be immersed in fast charging water, Apple’s 30 Watt USB-C may offer the best performance at a suitable price. And get the most powerful 87 Watt brick from Apple if you are looking for the fastest possible charging.

Know about Apple factory chargers and third-party chargers

Factory Chargers – 

By default, Most iPhone models include a 5 Watt charger. Believe us, it is pretty slow for the current age. On the other hand, an iPad may come with a 10 Watt or 12 Watt adapter; depending on the model. 

However, you will need to use Apple’s USB-C adapters to take the most advantage of fast charging. Here are the USB power adapters from Apple – 

This indicates the 87 Watt charger is the powerful charging option right now. We should also inform you that 10 Watt and 29 Watt power adapters (discontinued in June for the 12-inch MacBook) are no longer sold. The 29 Watt version was replaced with a new 30 Watt power adapter.

Fragmented third-party chargers –

Belkin, Anker, and Nomad are the first major brands to offer the best USB Type-C cables for both worlds (iOS and Android). You must know, not all chargers and cables are equal, there are limitations for power and charging speed.

You can consider the following options to get some encouraging improvements – 

If your budget is tight, just use a 10W or 12W iPad charger to double the charging speed of your iPhone without having to purchase unnecessary items.

Please Note: 
Whatever you do, avoid very cheap chargers at all costs that are not certified by MFi (Made for iOS) certification. Because they can drain your iPhone’s battery life or damage the phone itself.

Summing up

At the end of this discussion, we want to encourage the proud owners of iPads and iPhones to buy an Apple’s 30 Watt USB-C adapter. This will not only increase the charging speed significantly but can be also used as a spare charger along with the default 5 Watt or 10 Watt charger. If you don’t have the money, you can also use the 10Watt or 12 Watt charger that you get from an iPad. It is more than enough. 

Hope you have enjoyed knowing some interesting facts about iPhone’s fast charging. Leave a comment below if you have any queries.