One of the most exciting recent rumors around the as yet un-announced iPhone 15 is a substantial upgrade to its battery tech in the form of a stacked battery pack. Using the same kind of tech as EVs, a stacked battery will not only extend the battery life of the iPhone 15, but could also facilitate much faster charging, with speeds reaching up to 40W. Considering that Apple says that Apple's current best iPhone, the iPhone 14 maxes out at 30W, this is a significant bump in charging speed.
Leaker RGcloudS on Twitter says that they've seen 40W charging over wire, and then an increase in MagSafe as well to 20W. Whether it's coming to iPhone 15 however remains to be seen, and the same leaker says that it could also be for iPhone 16 instead.
