The iPhone 15 series could feature enhanced stacked battery technology for improved energy density and extended lifespan, according to a recent rumour by Twitter user RGcloudS. This information emerged as part of an alleged leak regarding Samsung's Galaxy S24+ and S24 Ultra models, which are reportedly also adopting the same technology.
Stacked batteries use a lamination manufacturing technique that folds elements into zig-zag layers instead of rolling them up. This results in less wasted space within the cell and more active material, leading to higher overall capacity. In addition, heat distribution is more uniform across the cell, extending its lifespan.
Electric vehicles heavily use stacked batteries due to their high power output, rapid recharging capabilities and superior energy densities. They're also used in medical devices, aerospace/aviation industries and renewable energy storage systems.
RGcloudS also suggests Apple might be exploring 40W wired charging and 20W MagSafe charging but isn't sure if it pertains to the iPhone 15 or iPhone 16 lineup. Currently, the iPhone 14 Pro Max offers peak wired charging speeds of up to 29W while MagSafe only charges at 15W.
Although this rumour has circulated widely on various websites and news outlets from RGcloudS who primarily handles Android leaks; their credibility with respect to Apple leaks remains uncertain.
We shall wait and see.
Rumoured Battery Upgrade for iPhone 15 Series