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"Virtual power" is an unprofessional term. It is a common name given by ordinary users to one of the characteristics of batteries. Every battery has such a physical characteristic: as long as there is electrical energy in the battery, the battery itself may try to maintain its nominal physical voltage until it completely loses energy.

The specific description of this phenomenon is as follows: When the battery's discharge is almost complete (the electrical energy is almost exhausted), but there is still a very small amount of electrical energy left. At this time, if the battery is removed from the working environment (the circuit is disconnected), the battery voltage will slowly return to the nominal voltage (3.6V for lithium batteries). However, this is theoretical data, and the actual situation may be even lower. But the voltage close to the nominal value at this time does not mean that there is electrical energy! When you connect it to the working environment, since the battery is discharging and there is not enough electrical energy, the working voltage of the battery will immediately drop to the minimum and it will not be able to work normally. This phenomenon is what people often call the "virtual power" phenomenon.

Generally, when batteries have such problems, it is mostly caused by directly plugging a power adapter with insufficient capacity into the mobile phone for charging or using a "universal charger" for a long time. Whether you charge with constant voltage or constant current, the amount of electricity consumed is the same! Moreover, if the current is not limited during constant voltage charging... the temperature of the battery will be extremely high, and then it may explode (assuming the power supply voltage is 4.2V, the battery voltage is 2.5V, the internal resistance of the power supply is 0, and the internal resistance of the battery is 200 milliohms. In this case, the charging current can reach 8.5 amperes. Generally, mobile phone batteries cannot withstand such a large current. And the internal resistance of a new battery is also much lower than the 200 milliohms set by the author, so the current will be even larger. (Some inferior universal chargers deliberately adjust the cut-off voltage to 4.3V to make users feel that the batteries charged by them are durable. At this time, the battery has been overcharged, and too small a charging current is also harmful to the battery).

For lithium batteries, charging them whenever needed is actually more conducive to extending the battery's service life than deep charging and deep discharging. A charging current that is half of the battery capacity also helps to extend the battery's service life. So if you are not a DIYer with good hands-on ability, it is better to use the original charger.

Conclusion
In fact, what we often call "virtual power" can actually be understood as a "last gasp" phenomenon shown when the power of the mobile phone battery is about to be exhausted. It doesn't mean that when the mobile phone battery suddenly drops 20% of its power when it is fully charged. For those who encounter such a situation, don't use "virtual power" to explain this problem. Hurry up and replace the battery!

Finally, the author will introduce several tips for keeping the battery's "enduring power":

1. Generally speaking, the batteries used in mobile phones have an activity issue. How to activate the activity of the mobile phone and make the battery in the most efficient state has become an important issue to pay attention to when using mobile phones. And the activity of the battery is related to the environmental temperature. Generally speaking, mobile phone batteries can work normally between -10°C and 50°C. Therefore, we should try our best to avoid using mobile phones in an environment where the temperature is higher than 50°C or lower than -10°C, otherwise the usage time and service life will be greatly shortened.

2. Some people like peace and quiet and don't want the ringing sound of the mobile phone to disturb themselves or others, so they enable the vibration function of the mobile phone. Little do they know that this function consumes a considerable amount of battery power. If you want the mobile phone to work for a longer time with the same amount of power, the author suggests that you'd better cancel this function.

3. By default, mobile phones will automatically turn on the "night light illumination". However, this function is not bright but consumes the most power, so it is of little use. Of course, if you urgently need to use the night light illumination function in a dark state, you can set and operate it as follows: First, open the option menu of the mobile phone, select the "Other Settings" menu item in it, then open the "Mobile Phone Settings" option in it, and press the button to set it. Put a "√" in front of the "Auto Lock Keyboard" option, and then you can find that the night light illumination appears again!

4. When using a mobile phone in a place where there is no network signal or the signal is extremely weak, it will consume a large amount of the mobile phone battery's power. Therefore, in this case, you should turn off the mobile phone.

5. If you are a careful user, you will find that when the keys of the mobile phone are pressed, there will be accompanying sounds. These accompanying sounds can hardly be called musical and only have the "function" of disturbing others. What's more, they also consume battery power! Therefore, we should firmly turn off the "Key Accompanying Sound" function. Of course, if you like to show off, that's another story.

6. If you are a thrifty person, you will surely think of this trick, that is, try not to answer phone calls as much as possible. Hearing this, you may be angry and shout, "Are you kidding us?" (and then you won't read the following content, thinking it must be all "rubbish"). Wait a minute. The author hasn't finished speaking. What the author means by not answering phone calls here is to try to use the "Call Forwarding" function to let the mobile phone automatically transfer calls to a fixed phone. Just think about it. When there is a fixed phone available, it is such a waste of power to use the mobile phone to answer calls. Transferring calls to a landline phone can save power and reduce radiation. Why not do it?

7. The most important thing in using a mobile phone is to have practical functions. For those functions with little practical value, it is best to disable them all, which can save more power. For example, the functions that we should disable include the "Service Prompt Tone" function, the "Power-on Greeting" function, the "Animated Menu" function, and the "Quick Network Search" function. All of these functions consume battery power.

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