Cell phone battery is not fully charged, useless on charge, affect battery life?

·     Cell phone battery is not fully charged, useless on charge, affect battery life?

           Unplug the phone battery is not fully discharged, the battery will run out of charge will affect the battery life or capacity?

·         First of all, a direct answer to the question:

·         • Unplug the phone battery and unplug it before use, without affecting the battery life. However, if the conditions permit and not too troublesome, even with the charging cable will be more conducive to the use of battery life.

·         • The battery is charged when it runs out, which is good for battery life. On the contrary, if every time the battery power is used very low, or even light, a great harm to battery life.

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·         There are many mechanisms for the decline of lithium-ion batteries, which can be divided into two categories: abuse and decline. Abuse of recession can be avoided, including overcharge, over discharge, low temperature, high-power charge and discharge, and so on. For the phone's use of the scene:

·         • Overcharge: This is not the case with electronic devices that have circuit protection, so users do not have to worry about it.

·         • Excessive: This is a vague concept. In general, try not to use the phone below 20%, especially not below 5%, irreversible damage to the battery.

·         • Low temperature: Mainly refers to the low temperature charging is harmful. Electronic devices are generally protected (the iPad is not charged at low temperatures), so users do not have to worry.

High-power charge and discharge: the discharge of electronic equipment, generally more moderate. Is always playing games, cell phones can hold a three or four hours, which is up to 0.2C discharge, very gentle, users do not have to worry about. Charge it, but also by the charger and electronic equipment circuit protection, users do not have to worry about.
      •The normal recession is unavoidable. The main influencing factors are the integral of discharge depth and the state of charge at rest.

·         Depth of discharge integration: also known as the number of discharge cycles, such as from 100% to 50%, which is even 0.5 cycles. This means that the more you usually use, the faster you decline. But the phone is used to buy it, can use it.

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·          •State of charge while standing: This is an academic challenge. The mainstream view is that the higher the charge, the faster the recession. What this means is that 100% of the battery is put in a month, and the battery with 50% of the battery lasts a month, the former's capacity declines more.

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·          Therefore, what is the recommended usage? as follows:

·         • First, avoid abuse. Remove the part of the circuit protection, users need to be careful, try not to use the phone power is very low - carry charge treasure it.

·         • Second, reduce the decline during normal use. Of course, the time is still used, you can not play the phone in order to protect the battery, right? Here's advice is: nothing will put the charging line plugged into the phone to charge. In this case, the phone will take power from the outside, equivalent to reducing the number of discharge cycles.

·         • Finally, the "best" way to get used to it is to maintain the phone's battery charge at 30% -50% of its low battery level until it reaches 100% two hours before leaving. This reduces "stand-by time in high battery condition." - Of course, this strategy is not applicable to consumer electronics such as cell phones, which is disproportionate to the cost. But for electric vehicles, the battery is very expensive, it is worth developing such a smart charger. In fact, many agencies are doing.

Q & A summed up the 3 questions of my friends based on the comments:

1. Apple or book or experts say the battery should be refreshed from time to time to be full, to be able to maintain the life ah! ?

A: Apple or book or experts should say that the previous generation of rechargeable batteries, nickel-metal hydride batteries, memory effect. The lithium-ion battery, no matter in theory or in practice, has never observed any memory effect. Therefore, the apple store or book, or experts such instructions, there is no basis.

2. plug in the charging cable to play the phone, it is not while charging, while discharging, the loss of the battery more?

A: The friend who raised this issue is imagining the battery as a "reservoir" model. Reservoir imports, exports, it is possible to import water, and exports in the water. Under this model, it is possible that the water level will not change (the electricity level will not change), but the actual flow rate will be very big. The attenuation of battery life is related to the flow is not fast decay fast? The problem with this idea is that the battery is not a reservoir, it has no two ports, only one port: this port is either charged or discharged, and no charge-discharge occurs at the same time.

3. Plug in the charging cable to play the phone, it explodes?

A: There should be a case of an explosion in a video game player, but I can not tell which ones are true news and which ones are fake news. For example, NetEase mobile channel, if Apple does not renew Apple cell phone explosion will occur, Samsung will not renew the phone Samsung cell phone explosion news ... ...

Try to analyze, while playing the phone while charging, will charge the heat (derived from the battery internal resistance, the power comes from the charging line) and the electric heating (from the CPU and screen, the power comes from the charging line) of the two Simultaneous heating effects can cause higher temperatures, potentially risking an explosion (if battery quality is not acceptable).

      After all, the explosion is a battery safety issue, not a phone battery life issue