Yes, you can charge your iPhone 14 model with your old charger provided you already have a previously used iPhone or iPad with a lightning cable.
So, all new iPhones can be easily charged by your old chargers if they are in perfect condition. Otherwise, you have to buy a separate charger as the box will not have a charger in it though a lightning cable will be available adapter is not included in it.
The short answer is to choose Apple's 30W USB-C power adapter, which at $39 is the company's lowest-priced charger that can charge the iPhone 14 and iPhone 14 Pro Max at their maximum supported charging speeds of 25W and 27W, respectively.
Note: For fast charging, iPhone 12, iPhone SE (3rd generation), and later models require a power adapter with a minimum power output of 20 watts, such as the Apple 20W USB power adapter.
Yes, the 5 watt power adapter and cable from your iPhone 7 are okay to use on the iPhone 14.
The standard 5W adapter takes 3.5 hours or more to charge an iPhone 11 entirely. Assuming the iPhone 12 has a similar battery size as iPhone 11 and adopts the same fast charging technology, the 20W fast charger will be able to charge up to 50% in 30 minutes, and up to 100% in 2 hours and 8 minutes or so.
You can use the Apple 12W USB Power Adapter to charge your iPad, iPhone, Apple Watch, and other Apple accessories, like AirPods and Siri Remote. Just connect your device to the power adapter with the USB to Lightning cable, or Apple Watch charger that came with your device.
You can safely use an Apple approved 20W charger for your iPhone 11. It will not hurt your battery health.
20W USB chargers are not dangerous to use with an iOS device. A non-defective USB charger coupled with a non-defective iOS-device will not overheat, explode, or reduce the life-time of the device.
However, your iPhone will max out at 30 watt charging speeds, so using a higher-rated charger will not make your phone charge any faster than that.
Unlike older batteries that used nickel–cadmium, the latest lithium-ion batteries in most iPhones nowadays do not require you to fully charge your new iPhone before use. You can immediately use it, or topup the charge if you need to for the new iPhone.
iPhone 14 Charging Options
As it stands, iPhone 14 users will need to use a Lightning cable and power adapter if they want to use wired charging. The Lightning to USB-C cable is included in the box, but a charger isn't. This means users will need to use a power adapter that has a USB-C input to charge their iPhone.
Your new phone and your old charger are likely different voltages. New phones will likely recognize old chargers at lower voltages than the charger designed to go with the phone. However, the phone will adjust to the old charger's voltage, meaning that the phone itself and the battery will not be harmed.
As you can see, charging your iPhone 14 Pro in your car is easy. All you need is an adapter, USB-C cable, and a car charger and mount. Once you connect the adapter to the cigarette lighter port, you are good to go.
You can use either a USB-A to Lightning cable or the newer USB-C to Lightning cable with your iPhone. You can use any of the adapters listed below to charge your iPhone, iPad, Apple Watch, or iPod. You can also use a Mac USB-C Power Adapter or third-party adapters that comply with applicable safety standards.
Maximum charge rate is determined by the device. A 20W adapter will not damage the battery, but will just charge 4 times faster than a 5W.
While fast charging can increase the rate at which your battery loses capacity, its actual impact is only about 0.1 percent more capacity lost than without using fast charging.
Is it safe to charge iPhone 11 with a MacBook 30w charger. And will it damage the battery health? Yes, it is fine.
The 20W charger doesn't harm your battery.
Yes, you can use your smartphone while charging. There is no danger in using your phone while it's charging. When you use your phone while charging, the battery is charging at a slower rate than normal to allow enough power for the ongoing usage.
Whether it switches the iPhone to USB-C on the device side, or ditches the physical port entirely in favor of MagSafe wireless charging, there's no harm in reaping the benefits of USB-C-based charging in the meantime.
Apple 30W USB-C Power Adapter
This is the official charger from Apple that can quickly charge your iPhone 14 at up to 30W speed. It has a single USB-C port and can be used to charge not only your iPhone but also the iPad Pro, Apple Watch, and AirPods.
The iPhone 14 lineup comes with what Apple says is roughly 1 hour longer battery for each model and the 14 and 14 Pro do feature larger mAh capacities (14 Pro Max capacity is ever so slightly less but battery life is up).
You're good to go if you have a USB-C charger that supports at least 20W. The phone will get to 50% capacity in about 30 minutes. That's great for replenishing the battery quickly in a pinch, although the iPhone's battery charging speeds pale in comparison to some Android handsets.