Macworld dug through iOS 27 Developer Beta 4 and found something Apple’s software has never included before: Battery Health strings written for multiple batteries instead of one. That small wording change is turning into one of the more compelling foldable iPhone clues yet.
The newly discovered strings reference “batteries” performing as expected, batteries that have “significantly degraded,” and warnings about one battery potentially not being genuine Apple hardware. Every iPhone Apple has ever shipped uses singular battery language. This is a first.
Software doesn’t need messaging for multiple independently managed batteries unless the hardware behind it actually has them. Even the iPhone X’s L-shaped, two-cell battery was always treated and reported as a single unit; this is something structurally different.
This isn’t an isolated find. Earlier iOS 27 betas already contained references to fold states, hinge angle detection, and developer guidance for adapting to multiple screen sizes. Put together with the new battery strings, the software picture increasingly points toward a foldable iPhone.
Book-style foldables split their internal space around a hinge, so most manufacturers Samsung, Google, and Honor included place one battery on each side to balance weight and maximize capacity. Chinese leaker Digital Chat Station has separately claimed Apple’s first foldable will follow this same dual-battery approach, which lines up with what Macworld found in the code.
AppleInsider points out that software references aren’t proof of shipping hardware. Apple often builds code for prototypes that never make it to market. This is strong evidence, not confirmation.
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