
Hi, I have an iPhone 6s and recently my battery life drains fast even when low-battery mode is on and when my brightness is dimmed low, and my phone unexpectedly powers off on its own. What do I do to fix it? Do I need to replace my battery?
Every time it goes into winter, operation of iOS device would be affected by the cold weather, which greatly shortened the lifespan of battery. Recently, many iPhone users have encountered the dilemma like automatic shutdown or power failure. If these also sound like your predicament, stop panic, in accordance with the following tips for iPhone using in winter.
Tip One: Avoid extreme ambient temperatures

iPhone is designed to perform well in a wide range of ambient temperatures, with 62°to 72° F (16°to 22°C) as the ideal comfort zone. When using your device in a very cold environment, you may notice a decrease in battery life, but this condition is temporary. Once the battery’s temperature returns to its normal operating range, its performance will return to normal as well.
Tip Two: Try certain cases when operate the iPhone outside

You may find that your iPhone run slowly when launch specific application or switch between apps. This is mainly because the cold weather slow down the reaction of the liquid crystal. If you have to operate your device outside with a low temperature for a long period, I would suggest you that try certain cases on your iPhone to keep warm.
Tip Three: Measures for iPhone automatic shutdown

Bring your iPhone to a warmer environment, then turn on the device after a while. If your iPhone isn't responding, you can force restart your device: Press and hold both the Sleep/Wake button and Home button for at least 10 seconds, until you see the Apple logo.
In addition to the suggestions above for iPhone using in winter, there’re also general performance tips for you. First, please make sure you’re using the latest iOS version, then adjust your screen brightness and use Wi-Fi as possible. Furthermore, enable Low Power Mode or turn off Location Services for some apps are also considerable options.
Here’s the learning for iPhone using in winter, hope it can help you.