It’s the “battery anxiety” again! How long can a mobile phone last with 1% battery?

In modern society

Mobile phones have become part of our lives

An integral part

Have you ever been in an emergency?

Watching the phone battery slowly approach 1%

Feeling anxious and helpless?

Have you ever been curious

How long can a mobile phone last with 1% battery ?

In this issue, Dr. Ke will take you to explore

The secret of mobile phone battery

Estimating the battery capacity of a mobile phone is a complex process that relies on monitoring the chemical reactions inside the battery . In theory, if the remaining amount of chemical reactants inside the battery can be directly measured, the battery capacity can be known very accurately. However, in practical applications, this approach is almost impossible. Mobile phones are usually unable to directly measure the reactants inside the battery, but indirectly infer the capacity by monitoring parameters such as voltage and charge .

The relationship between the voltage and power of a mobile phone battery is not linear . When the battery power is gradually reduced, especially when it is close to being fully discharged, the voltage will drop rapidly. If the power level is displayed directly based on the voltage change, the power level display may suddenly drop sharply, such as from 15% to 0%.

The voltage is not only affected by the remaining charge of the battery itself , but also by many external factors such as temperature and the battery's operating status (such as charging or discharging rate). To improve the accuracy of power estimation, the phone also uses a coulomb meter to measure the amount of charge released by the battery. The coulomb meter calculates the difference between the total charge of the battery and the amount of charge consumed, helping the phone to more accurately predict the remaining charge.

Despite this, due to various factors, the remaining power displayed on the phone is still only an estimate , not an exact value. Although the introduction of the coulomb meter has significantly improved the accuracy of power prediction, it still cannot achieve 100% accuracy . The coulomb meter estimates the remaining power by measuring the amount of charge entering and leaving the battery, but in actual use, due to factors such as battery aging, temperature changes, and sensor accuracy limitations, certain errors will occur .

Due to the uncertainty of mobile phone battery prediction, different mobile phone manufacturers have adopted different approaches to battery display strategies . Some manufacturers believe that given the limited accuracy of battery estimation, they choose to display 1% of the remaining power in advance when the battery is low. The main purpose of this design is to remind users to charge in time to avoid inconvenience caused by running out of power. At the same time, many mobile phones will automatically enter low power mode when the battery is close to running out , and extend the use time of the last 1% of power by reducing screen brightness, suspending non-essential background programs, and other measures.

Some manufacturers have taken a more proactive approach, encouraging users to quickly find a charger for fast charging when the battery level drops to 2%. The purpose of this design is to gain more usage time for users by efficiently charging in a short period of time.

Therefore, the difference in power display on different mobile phones does not completely represent that a certain mobile phone has better battery life. Some mobile phones may be able to be used for a long time when the battery level is 1%, while some mobile phones may only last for about 30 seconds when the battery level is 2%. These differences reflect more the differences in the power management strategies chosen by manufacturers rather than the fundamental differences in battery life. When choosing a mobile phone, users should consider these factors comprehensively to find the product that suits them best.

In order to extend the life of the mobile phone battery , the correct charging method is very important. Dr. Ke has prepared some charging "tips" to help extend the battery life:

(1)

Avoid overcharging and discharging

Although modern smartphones are usually equipped with charging protection mechanisms, keeping the battery at 100% for a long time or letting it drop to 0% will cause some damage to the battery. The ideal charging range is between 20% and 80% , which can effectively reduce the loss of the battery due to charge and discharge cycles.

(2)

Avoid high temperature charging

High temperatures are the natural enemy of lithium-ion batteries. Therefore, try to avoid exposing your phone to high temperatures for a long time while charging, such as exposing it to the sun or using apps that consume a lot of performance.

(3)

Use original charger and data cable

An inappropriate charger may cause the charging speed to be too fast or too slow, or even cause overheating, which may accelerate battery aging and affect the health and service life of the battery. Therefore, try to use the original charger and data cable provided by the mobile phone manufacturer to ensure the safety and stability of charging.

(4)

Avoid using while charging

Using your phone while charging will increase the load on the battery, especially when running high-power applications. This will not only cause the phone to heat up, but may also accelerate battery aging. Therefore, it is recommended to minimize the use of your phone while charging , or only use some low-power applications.

How long can a cell phone last with 1% battery?

There is no single answer

But develop reasonable charging habits

To extend the life of mobile phone batteries

Play an important role

Dr. Ke reminds everyone

Master the correct charging method

Give your phone a break

It is not only beneficial to extend the life of mobile phone batteries

We can also be responsible for our own safety!

This is the end of this issue

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Source: Guangzhou Daily, Science Popularization of Power, Tadpole Musical Notation.

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