Uncover the reason why iPhone loses power quickly in Erbin

As winter tourism in Harbin continues to be popular, the city has attracted a large number of domestic and foreign tourists with its unique ice and snow culture and magnificent snow scenery.

However, in this world of ice and snow, a problem has also attracted widespread attention and discussion among mobile phone users - many tourists who brought iPhones to visit found that their mobile phones encountered extreme conditions in places such as Harbin. At low temperatures, the battery power drops extremely quickly, and even more than 70% of the battery power is lost in a short period of time. As a result, some mobile phones have black screens and cannot be used normally.

Why does the iPhone lose power quickly in a low temperature environment?

First of all, lithium-ion batteries play a vital role in the iPhone and many other smartphones. It is the core component of the energy supply of these devices.

Its working principle is based on the migration of lithium ions back and forth between the positive electrode (such as lithium cobalt oxide, lithium nickel cobalt manganate, etc.) and the negative electrode (usually graphite or silicon-based materials) through the electrolyte during charge and discharge cycles. chemical reaction process.

This process requires the electrolyte to have good ionic conductivity to ensure that lithium ions can efficiently shuttle between the two electrodes.

However, in low-temperature environments, especially near or below freezing, the performance of lithium-ion batteries is significantly affected. The main reasons are as follows:

Increase in electrolyte viscosity: Under low temperature conditions, the molecular motion of the electrolyte slows down, causing its viscosity to increase and its fluidity to deteriorate.

Just like engine oil becomes more viscous in cold weather, the resistance to ion movement in the electrolyte increases, which greatly reduces the migration rate of lithium ions in the electrolyte.

Decrease in conductivity: Due to the increase in the viscosity of the electrolyte, the free diffusion ability of lithium ions inside the electrolyte is weakened, resulting in a significant decrease in the overall conductivity.

Conductivity is a key parameter that measures the ability of the electrolyte to transport lithium ions. Its reduction directly affects the charge transfer efficiency inside the battery.

Increase in electrode interface impedance: Low temperature will also cause the interaction between the electrolyte and the electrode surface to change, especially the solid electrolyte interface film (SEI film) formed on the electrode/electrolyte interface may thicken or deteriorate its performance. The deterioration further increases the resistance to charge transfer, that is, the electrode interface impedance increases.

Diffusion hysteresis inside the active material: The insertion and extraction process of lithium ions inside the active material will also be slowed down due to low temperature, and the diffusion kinetics will be blocked, which means that even if the lithium ions reach the electrode surface, they may have difficulty reaching the electrode surface. Rapidly entering or leaving the lattice structure of the electrode active material, thereby reducing the actual usable capacity of the battery.

How to help make your iPhone anti-freeze

In response to this problem, the following are three practical iPhone anti-freeze strategies:

Physical Warmth Method: Provide iPhone A warm environment is the basic method to prevent it from losing power quickly at low temperatures. Try to avoid direct exposure to cold air by using a thermal phone case or placing it in a pocket lined with insulating material.

In addition, do not leave your iPhone in an outdoor freezing environment for a long time, such as in a car, on an outdoor table or chair, etc. Reasonable use and charging strategy: Under low temperature conditions, try to avoid using your phone while charging, as this may not only cause uneven heating of the battery, but may also increase battery wear and tear.

In addition, if conditions permit, you can choose to charge in a warm indoor environment to improve charging efficiency and reduce battery loss. Turn on low power mode and optimize settings at the right time: The iPhone's built-in "low power mode" can help the phone save power at critical moments.

When this mode is enabled, the system will limit background application activity, email retrieval, automatic downloads, and some visual effects to maximize battery life.

At the same time, turning off unnecessary location services, Bluetooth, Wi-Fi and other functions, and adjusting the screen brightness to a moderate level can also reduce the impact of low temperature on the battery to a certain extent.

Summary

To sum up, the main reason why the iPhone loses power quickly in cold areas such as Harbin is the impact of low temperature on the performance of lithium-ion batteries. By taking the above-mentioned measures of physical warmth, reasonable use and charging habit adjustments, and optimizing system settings, this problem can be effectively alleviated and ensure that the iPhone can have good battery life in winter.

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