http://www.newsweek.com/these-are-best-most-useful-magsafe-chargers-iphones-1609761

Apple added magnets to the back of its iPhone 12 line and MagSafe was reborn. This time, it's not a single-use implementation, like only delivering power, it's now more general and universal. There are wallets that use the magnets to suction a cardholder to the back of the phone. There is a MagSafe compatible Popsocket, and there will be other unique uses for it in the future. But, one of the convenient uses right now is a way to instantly align wireless chargers so that the Qi coils are secure.

One reason to go MagSafe, instead of using any regular wireless charger, is increased speed. iPhones wirelessly charge at 7.5 watts by default. MagSafe chargers can go twice as fast and deliver 15 watts to a phone. Of course, since it's Apple, there are plenty of strict details that dictate how power is distributed and, even, what can officially be called MagSafe. To that point, while all these chargers use the iPhone 12's magnet and are MagSafe compatible, not all of them are sanctioned for the full 15 watts of wireless power that MagSafe can deliver. Even with a slower charging speed, these accessories provide excellent functionality and utility. The prices below will fluctuate as products go on sale. Keep an eye out for future deals.