Apple’s iPhone 16 will feature two hardware upgrades to avoid overheating issues that plagued iPhone 15s

Apple’s upcoming iPhone is set to include two hardware updates to avoid the overheating that plagued the latest iPhone 15 Pro, while maintaining a sleek, slim design.

According to one leaker, the first part of Apple’s new solution will be a graphene heat sink: thin layers of a highly conductive, nano-engineered material designed to absorb heat and transfer it out of the device.

This leaker said that the second part of this upgrade will be a new metal battery box inside the phone, which will help draw heat from the battery and deliver it to the heat sink.

Overheating has been plaguing Apple’s latest model, with several user reports claiming that the iPhone 15 Pro reached over 100 degrees Fahrenheit after just a few minutes of use.

While Apple attempted to fix the issue with a simple software update, iOS 17.0.3, some early demos showed the iPhone 15 rising to higher temperatures than it did before the update.

A well-known collector of Apple prototypes, design validation test products, and other rare pre-production hardware, who goes by @KosutamiSan on X (formerly Twitter), leaked details of the new hardware fix on Wednesday.

An Apple prototype collector was at the forefront with a leak about the USB-C components included in the iPhone 15, but was also quick to spread stories that proved to be untrue. When asked where the evidence for a graphene heat sink came from, Kusutami said: “The prototypes I have.”

A well-known collector of Apple prototypes, design validation test products, and other rare pre-production hardware, who goes by @KosutamiSan on the X, leaked details of the new hardware fix on Wednesday.

“Apple is actively working on a graphene thermal system for the iPhone 16 series,” Kosutami said Published on X“To solve pre-existing heating problems.”

The leaker continued: “The battery of the (Apple 16) Pro series will change to a metal casing for the same reason.”

Graphene, a nanoscale lattice of carbon atoms, sometimes with other added or “doped” elements, has been shown in some cases to conduct electricity (and thus heat) up to 70 percent better than copper metal.

A well-designed thin layer of graphene can pull heat from the iPhone’s internal components and vent it out into the open air without any of the noise or bulk of the new fan.

The proposed metal battery case should also help in this process, as metal is also an excellent conductor of heat and electricity, making it a good intermediate layer for the new heat sink design.

according to Apple insiderKosutami has a mixed record with expectations.

The Apple prototype collector was ahead of the curve with a leak about the USB-C components that came with the iPhone 15 but was also quick to spread some stories that proved to be untrue such as claims that the iPhone 15 Pro will feature a Thunderbolt cable.

When one X user asked where the evidence of the new graphene heatsink leaking came from, Kosutami replied: “The prototypes I have.”

iPhone 15 or 15 Pro owners, or anyone who uses Apple’s premium device in hot weather, will know and dread the warnings asking users to wait until the iPhone “returns to normal temperature.”

Some iPhone 15 Pro users claim that their smartphones are still overheating despite Apple issuing a fix with iOS 17.0.3 update. Some early demos even showed a few iPhone 15 devices reaching higher temperatures than they did before the update

Apple released its attempt to fix the iOS 17.0.3 overheating issue early last October.

Adarsh ​​Kumar, an Indian National Party member for Karnataka, told DailyMail.com at the time that his iPhone 15 Pro was still experiencing heat issues.

But, as he recounted, his smartphone would only overheat when charging it with MagSafe — even when “left idle.”

“The titanium surface also makes it difficult to hold the phone when it gets hot,” Kumar said. “It’s not just the backside that’s overheating.”

DailyMail.com also spoke to X user ‘Maxwell’ who confirmed that his iPhone 15 Pro Max is still overheating after a software update.

Maxwell shared a screenshot of his smartphone which displays a ‘Charging notification on hold’.

“Charging will resume when iPhone returns to normal temperature,” the notification reads.

He also shared that his phone’s speakers would crack and that Apple’s high-end “consumer” device “couldn’t handle a small drop.”

Other iPhone 15 Pro owners shared their frustrations about MacRumors Forum, where many have also pointed out issues while using the MagSafe charger.

“I’ve had my phone 15 pro (512GB) since release day and charge it every night with my Belkin 3 in 1 MagSafe charger. I’ve used this charger for three years with no issues,” user TotalMacMove posted.

“I woke up yesterday morning and my phone was at 68 percent charge, and I received multiple alerts saying that charging had been paused due to temperature and that the phone was very hot.”