A new rumor gives us an idea of what to expect for the batteries on Samsung's Galaxy S25 Slim and Apple's iPhone 17 Air.

It's already been a banner year for battery life, with newly released devices like the OnePlus 13 and OnePlus 13R producing impressive results in our battery testing. And soon, the new Galaxy S25 models from Samsung will have their chance to show just how long they can last on a charge.

Samsung, like Apple, is rumored to be working on a super-thin smartphone, and on Wednesday, OnLeaks and Smartprix published renders of a phone they call the Galaxy S25 Slim. The renders show a phone with a flat front,