The problem with super-thin phones is that space is at even more of a premium than usual. Since bigger batteries need more space, there's a limit on how much battery you can actually get in there. There are things you can do to improve battery density, and reduce the required space, but word is that the Samsung Galaxy S26 Edge won't be doing that.
Certification documents spotted by SamMobile show the 2026 Edge as coming with the same lithium-ion battery chemistry as your average smartphone.
