The iPhone 17 Air and Samsung Galaxy S25 Slim might not be all that thin after all

Samsung and Apple have both reportedly failed to fit decent-capacity batteries in their rumored thin phones, leading them to abandon slimness.

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Leaks suggest that we’ll see slimmer smartphones from both and next year, with reports suggesting that , and (which could potentially launch as an iPhone 17 Slim or something else altogether) could land in September, alongside the rest of the series. But now we’re hearing that they might not fully live up to those names. According to , citing South Korean leaker yeux1122, both Samsung and Apple have failed in their attempts to increase the density of the batteries in these phones through the use of new materials and techniques.

Had they succeeded, they’d have been able to equip these rumored slimline handsets with small yet high-capacity batteries, but as they’ve reportedly failed, @Jukanlosreve says they’ll instead make the phones thicker than initially planned, so they can still have reasonable battery life. In the case of the iPhone 17 Air, Apple will apparently now use the same battery technology as its existing phones, and the iPhone 17 Air will be thicker than 6mm. Neither of these leak sources say how thick, but around 6mm is apparently what Apple was previously aiming for.



In the case of the Samsung Galaxy S25 Slim, Samsung is said to be using different battery technology to that used in its current handsets even though the company reportedly hasn’t seen the results it hoped for, and the phone will apparently be sold in limited quantities. Is there still any point to these phones? This begs the question as to whether there’s still much point in Apple and Samsung making these phones, when their key selling point is supposedly that they would be a lot slimmer than the rest of the and iPhone 17 models, if in reality they may not be much slimmer. We don’t know exactly how thick either phone will be, but for reference the is 7.

8mm thick, so if the iPhone 17 Air is thicker than 6mm as rumored here, it might not be noticeably slimmer than standard iPhones. Of course, this is all just rumor for now – we don’t even know for sure that these phones really are in the works, let alone that they’ll be thicker than planned. So take all this with a pinch of salt – but this latest leak doesn’t sound promising for anyone who's hoping to get their hands on a slimline phone next year.

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