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iPhone users are amazed by a little-known charging hack - as one claims 'this is the future'
For any smartphone owner, there's nothing more annoying than running out of charge during crucial moments.
But fortunately, a little-known charging hack may give iPhone users a few extra hours of juice.
When two iPhone 15s are connected by a USB-C cable, the one with the lower battery level will charge the other.
On X, iPhone user Sheel Mohnot posted a photo of him trying the trick out with the caption: 'you can charge an iPhone from another iPhone'.
Someone replied 'this is the future' while another said 'that's how you show somebody that you really love them.'
The little-known trick lets an iPhone 15 donate charge to another iPhone. Pictured, the iPhone 15 Pro Max, released last September. The iPhone 15 models were the first iPhones fitted with USB-C charging ports
On X, iPhone user Sheel Mohnot posted a photo of him trying the trick out with the caption: 'you can charge an iPhone from another iPhone'
Once they're connected by a cable, the two iPhone 15 devices will automatically communicate to know which one has the lower battery percentage.
The iPhone with more battery charge will then start powering up the other while losing charge of its own, according to Apple reseller iStyle.
On Apple's community page, some users noted that the trick also worked when using an iPhone 15 to charge an older iPhone model.
One person said their iPhone 15 went from 98 to 89 per cent charge to give an iPhone 11 a boost from 10 to 32 per cent.
However, an older iPhone model isn't able to charge up an iPhone 15 – only the other way around.
What's more, the trick is not possible between two older devices – such as two iPhone 11s.
On X (Twitter), someone replied to iPhone user Sheel Mohnot's post with the words 'this is the future'
Another said: 'That's how you show somebody that you really love them'
From last year, Apple was effectively forced to put USB-C charging ports on iPhones by the EU. A customer holds an iPhone 15 at a store in Los Angeles, California, on September 22, 2023 - the global release day
Of course, if you want to charge an iPhone 15 with another iPhone 15 you'll need a cable with a USB-C connectors at both ends.
Meanwhile, if you want to charge an older iPhone with an iPhone 15 you'll need a cable that has a USB-C on one end and Lightning on the other.
In case you missed it, Apple started putting USB-C charging ports on its iPhones last year, starting with the iPhone 15.
Before this, Apple had used 'Lightning', the tech giant's own in-house charging design.
Apple was effectively forced to change to USB-C by the European Union, which ruled in 2022 that having just one charging cord that can work with multiple devices made by different manufacturers will reduce e-waste.
Before iPhone 15, iPhones had Apple's proprietary power connector technology 'Lightning', discernable by its eight pins (pictured)
Apple did not seem happy about the law, however, arguing that it would 'restrict the industry's ability to innovate'.
The same month the law was signed off, Apple executive Greg Joswiak said the tech giant would comply with it – but only because it would 'have to' and had 'no choice'.
'But we think the approach would have been better environmentally and better for our customers to not have a government be that prescriptive,' he said.