iPhone Battery and Performance – The Official Line From Apple

Apple recently confirmed that iPhones were being slowed to tackle ageing batteries.

A new official release from Apple explains the reasons for devices being slowed down. You can find the full article here.

iPhone Battery

In summary, users may notice effects such as:

  • Longer app launch times
  • Lower frame rates while scrolling
  • Backlight dimming (which can be overridden in Control Center)
  • Lower speaker volume by up to -3dB
  • Gradual frame rate reductions in some apps
  • During the most extreme cases, the camera flash will be disabled as visible in the camera UI
  • Apps refreshing in background may require reloading upon launch

However there are key areas that are not impacted by this power management including:

  • Cellular call quality and networking throughput performance
  • Captured photo and video quality
  • GPS performance
  • Location accuracy
  • Sensors like gyroscope, accelerometer, barometer
  • Apple Pay

So What is a lithium-ion battery?

Lithium-ion batteries are type of rechargeable battery found in most mobile phones and devices such as laptops, iPads and bike lights. It is the iPhone battery of choice. They are a popular choice because they are light weight, compact in size and charge quickly. On top of this they hold their charge and only lose 5 percent of charge per month. They also handle thousands of charge cycles without any memory effect(damage caused by not fully discharging). Lithium-ion batteries aren’t without their faults however. They start degrading as soon as they leave the factory and really only have a life expectancy of 2 or 3 years. That said, they do go on far longer as iPhone users will acknowledge. They don’t like extremes of temperatures though. If you’ve ever left your iPhone on a sunny window ledge and come back to find its powered itself off, then that’ll be the battery calling time out.




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