reverse wireless charging is absolutely useless when compared to just using a wire.
there is a reason that, despite android phones implementing it, it hasn’t really caught on.
One of those things that when you hear about it or you read it in a specification sheet, it looks cool and useful.
in practice, though, real life factors make it practically terrible.
The phone being used as the wireless charger now has to be faced down, so you can’t really use it with something attached to its back.
wireless charging itself has about a 20-30% energy loss, so you are, no exaggeration, just burning through battery for a good portion of the time you are using it to wirelessly charge.
Plus, it’s just weird. different phones aredifferent sizes and we’ve got huge camera bumps so they will never fit together just right, it’s just a constant clashing of uneven phone backs.
Plus if you even dare to try to use this in hot weather, both phones immediately are going to get too overheated to properly charge.
it takes all of the negatives of regular wireless charging, the heat it generates, the lack of efficiency, the awkwardness with alignment at times, and amplify them. Plus, you don’t even get any of the convenience that regular wireless charging has.
you are much better off, just connecting the phones via a cable, or buying a battery bank.
PS: the hardware for reverse wireless charging has actually existed in the iPhones since the 12. Apple has just limited its usage to the MagSafe battery pack, and only when you are plugging the phone directly into a power source already.
and guess what? Whenever I’ve used my iPhone to wirelessly charge up the MagSafe battery pack, it’s slow, it gets hot, it likely eventually gives me the overheat warning or it just takes hours and hours. even if Apple enabled it to work between iPhones or to AirPods, which they probably could do with a software update, it would still be an awful experience and you would still be much better off just using a cable or a battery bank.