Should I Charge My Iphone 12 Before First Use. In the fewest words possible heat is bad for your iPhones battery. Apple recommends as do many others that you try to keep an iPhone battery between 40 and 80 percent charged.

This allows the iPhone to intelligently handle charging speed and capacity whenever the phone is charging. For example my Lenovo laptop will not apply a charge to the battery unless it is under 97. How to charge an iphone 12 for the first time.
The above is called calibration.
For fast charging the iPhone 11 the recommended power source is the 13 watt adapter and for the iPhone 12 and 13 Apple recommends the 20 watt adapter for the fastest charging. Many laptops did not do this on most just applying charge if it is not 100. But before you start using these devices there are several things youll need to do first. Probably not but it makes me feel warm and fuzzy inside.
