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Battery issues are not new in iPhones, which include excessive heating of units during the charging process. With this, Apple has updated its User Guide document for its users on how to properly charge their iPhones, alongside some reminders on things that should be avoided. That includes sleeping next to your iPhone while it is being charged.

The document shares Apple’s instructions for the appropriate charging process for iPhones. However, the main highlight of the update points to the practice of sleeping next to an iPhone and its charging accessories, specifically cables. According to the company, such an action could cause discomfort or even injury, especially during prolonged skin contact. It also stresses that other issues could occur if the materials are placed under a blanket or pillow while plugged. 

It notes that while iPhone and Apple USB power adapters “comply with required surface temperature limits defined by applicable country regulations and international and regional safety standards,” the above practices could still cause discomfort or injury. In line with this, the document provides some specific reminders.

“Use common sense to avoid situations where your skin is in contact with a device, its power adapter, or a wireless charger when it’s operating or connected to a power source for long periods of time,” Apple explains in the document. “For example, don’t sleep on a device, power adapter, or wireless charger, or place them under a blanket, pillow, or your body, when it’s connected to a power source. Keep your iPhone, the power adapter, and any wireless charger in a well-ventilated area when in use or charging. Take special care if you have a physical condition that affects your ability to detect heat against the body.”


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