«Breaking News» Why the cold causes your phone to shut down and how to protect it

You may have noticed that your smartphone tends to abruptly shut off when it's used outside in the cold. 

When that happens, there's not much you can do, since the phone is temporarily dead as a door nail. 

This occurs because the extreme cold is too much for your smartphone's battery. 

Many users have also reported similar issues with other battery powered gadgets, such as bluetooth headphones - which also contain batteries. 

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When a phone turns off in the cold, there's not much users can do, since the phone is dead as a door nail. This occurs because the temperatures are too much for a phone battery

HOW CAN YOU PREVENT YOUR PHONE FROM FREEZING? 

It doesn't take much for an iPhone to quit in freezing temperatures. 

For most iOS devices, the ambient temperature is between 32 and 95 degrees Fahrenheit.

Devices should be stored in temperatures that are between -4 and 113 Fahrenheit. 

It's not recommended that users operate their phones in extremely cold temperatures.  

However, if you have to use your phone in the cold, keep it in an insulated case or in your jacket pocket, where it can absorb some of your body heat to keep warm. 

It's fairly simple as to why smartphone batteries quickly become unusable in extreme temperatures - both hot and cold. 

Most smartphones nowadays run on a Lithium-Ion battery. 

Lithium-Ion batteries require liquid electrolytes, which sit between the two types of electrodes in the battery, in order to provide power. 

When smartphones with a Lithium-Ion battery are exposed to extremely temperatures, these liquid electrolytes effectively freeze, reducing their ability to send energy to your phone.

If it gets cold enough, the battery will stop providing energy completely, which leads to your smartphone turning off.  

'Lithium-ion batteries suffer so badly in freezing temperatures because they have very little internal resistance,' Hanumant Singh, an electrical engineer at Northeastern University told Wired.  

Singh added that a Lithium-Ion battery's reaction to the cold can be 'very dramatic,' with devices typically dying in about 5 minutes when exposed to temperatures colder than -35 degrees Fahrenheit. 

Lithium-Ion batteries require liquid electrolytes to provide power. When smartphones with a Lithium-Ion battery are exposed to extremely temperatures, these liquid electrolytes effectively freeze, reducing their ability to send energy to your phone

It's why Apple and other smartphone makers have specifically outlined when temperatures may be too hot or cold for you to whip your phone out.  

Apple recommends that users operate their iPhone when the ambient temperatures is between 32 and 95 degrees Fahrenheit.  

Apple has a detailed guide explaining what temperatures its devices should be used in  and what happens to iOS devices if they're exposed to heat for too long. The firm recommends that the iPhone X be used in places where the temperature is betwen 32 and 95 degrees Fahrenheit

'Low- or high-temperature conditions might cause the device to change its behavior to regulate its temperature,' the company's website states. 

'Using an iOS device in very cold conditions outside of its operating range might temporarily shorten battery life and could cause the device to turn off.'

Devices should be stored in areas where the temperature is between -4 to 113 degrees Fahrenheit, Apple's website reads.  

Any weather below -4 degrees Fahrenheit is likely to brick your phone.

Apple's guidelines for operating and storage temperatures aren't too different from what's advised for other smartphone models. 

Google's Pixel 2 phone is advised for use in temperatures between 32 and 95 degrees Fahrenheit and not below -4 degrees Fahrenheit.

Samsung doesn't give a recommended temperature range, other than noting on its website that 'your phone operates optimally at a normal temperature range.' 

Google's Pixel 2 phone is advised for use in temperatures between 32 and 95 degrees Fahrenheit and not below -4 degrees Fahrenheit. Samsung doesn't give a temperature range, other than saying that 'your phone operates optimally at a normal temperature range'

'Extreme heat and cold can damage your battery,' Samsung's website reads.

'For example, don't leave your smartphone in the glove compartment of your car on very hot or cold days. 

'A common myth is that batteries last longer if they are put in the freezer. This is not correct and can damage your battery,' it continues. 

A quick fix for the problem is to simply head indoors, wait a few minutes for your device to warm up and then try to turn it on.  

If it still doesn't turn on, plug the device into a charger and wait for it to restart on its own. 

The best way to prevent your device from turning off is to keep it out of the extreme cold. 

But if that's not possible, experts recommend that users keep their phone in an insulated case or, better yet, in their jacket pocket where it's closer to your body. 

HOW DO LITHIUM ION BATTERIES WORK?

Batteries store and releases energy by moving electrons from one 'end' of the battery to the other. 

We can use the energy from those moving electrons to do work for us, like power a drill. 

These two battery 'ends' are known as electrodes. One is called the anode and the other is called the cathode. 

Generally, the anode is made from carbon and the cathode from a chemical compound known as a metal oxide, like cobalt oxide. 

The final battery ingredient is known as the electrolyte, and it sits in between the two electrodes. 

In the case of lithium-ion batteries, the electrolyte is a salt solution that contains lithium ions—hence the name.

When you place the battery in a device, the positively charged lithium ions are attracted to and move towards the cathode. 

Once it is bombarded with these ions, the cathode becomes more positively charged than the anode, and this attracts negatively charged electrons.

As the electrons start moving toward the cathode, we force them to go through our device and use the energy of the electrons 'flowing' toward the cathode to generate power. 

You can think of this like a water wheel, except instead of water flowing, electrons are flowing.

Lithium-ion batteries are especially useful because they are rechargeable. 

When the battery is connected to a charger, the lithium ions move in the opposite direction as before. 

As they move from the cathode to the anode, the battery is restored for another use. 

Lithium ion batteries can also produce a lot more electrical power per unit of weight than other batteries.

This means that lithium-ion batteries can store the same amount of power as other batteries, but accomplish this in a lighter and smaller package.

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https://hienalouca.com/2019/02/01/why-the-cold-causes-your-phone-to-shut-down-and-how-to-protect-it/
Main photo article You may have noticed that your smartphone tends to abruptly shut off when it’s used outside in the cold. 
When that happens, there’s not much you can do, since the phone is temporarily dead as a door nail. 
This occurs because the extreme cold is too much for your smartphone’s b...

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