Apple has warned consumers against using third-party power adapters with their iOS devices as they can cause safety issues such as burns and electrocutions, but as it turns out, third-party chargers that have not been approved by Apple may also be responsible for causing damage to one of the chips in the iPhone 5.
According to UK repair company mendmyi and first reported by iMore, cheap third-party iPhone chargers and USB cables can possibly damage the U2 IC chip on the logic board of the iPhone 5, which might the device to fail to boot up or charge past 1% battery life after the battery drains.
Mendmyi says that it has seen multiple iPhone 5 devices with a damaged U2 IC chip and has narrowed the problem down to third-party chargers and USB cables, which do not properly regulate voltage.
It is not clear if the issue is limited to the iPhone 5 as some users have also reported third-party charger issues with the iPhone 5c, which may use the same component, but the iPhone 5s and the iPhone 5 use different U2 IC components. Users with an iPhone 5 experiencing charging issues that have used a third-party cable may have damaged their devices, which will need to be repaired by Apple or another repair outlet.The cause of this component becoming faulty is really quite simple -- third party chargers and USB leads!
The original Apple chargers and USB leads regulate the voltage and current to a level that protects your valuable iPhone and prevents it from damage.
Charging your iPhone using a third party charger or USB lead that does not regulate this as much allows for larger variables in voltage and current, this then damages the U2 IC and can leave you with a seemingly dead iPhone 5.
Apple has regularly recommended against using third-party chargers and cables. In mid-2013, the company even launched a third-party power adapter recycling program, following the electrocution of a Chinese woman allegedly caused by a counterfeit charger. Apple ran the recycling program from August to October of 2013, recycling counterfeit adapters and providing customers with a $10 credit towards an Apple-branded charger.
As of iOS 7, Apple also warns customers when they are using unauthorized cables or accessories with their devices. The company's Lightning connector, introduced with the iPhone 5, fourth generation iPad, and original iPad mini, utilizes several different chips to manage dynamic pin assignment and to recognize whether connectors came from authorized channels.
Article Link: Unauthorized Third-Party Chargers May Damage iPhone 5 Charging Circuitry