If you leave it alone, it will decline, and it will be useless in 2 years? How many years can a laptop battery last, how can it last longer?

The forum netizen littleshrimp has used the laptop for 2.5 years and it shows that there is 66% power left, but it can only be used for one minute. Not believing in evil, he tried it, and sure enough, it automatically shut down within a minute.

Release time:

2022-09-09

Author:

This notebook is usually used as a desktop computer with the power adapter plugged in. It rarely uses the battery alone to work. Because it is an integrated battery, it is inconvenient to remove it. I didn’t expect the battery to be “used”. Long standby time.

Why is this happening? Why does this kind of long-term plugging in the adapter damage the battery so much? ‍

Faced with this question, netizens shared their experience and opinions:

qwqwqw2088: So, the manufacturer will ask the user to deeply discharge the battery for a period of time, but it won't take long for a low-quality battery to be rectified.

wangerxian: My laptop battery has been used for about four or five years. I violently disassembled it, and there are four 18650 batteries inside.

soso: Apple has been using it for 4-5 years, and now it can last for more than half a day when fully charged. Your 66% is suddenly out of power, is there a problem?

dcexpert: Not much to do with plugging in, power management is done well enough. The aging of lithium batteries is unavoidable. Use them as you please. Good batteries will last longer, while poor batteries will be shorter. In the early days, 18650 cells were used, and the quality of individual cells would cause overall output problems. This is the case with many batteries that have been disassembled, especially Lenovo's notebooks, but most of the batteries are difficult to disassemble and replace the cells without damage.

Today's thin and light notebooks are all polymer batteries, and the probability of battery failure is much lower.

hahajing: The battery needs to be fully charged and discharged in one or two months. Second, the current electronic profit is greatly reduced, and the materials used are not as good as before. Either the manufacturer thinks that the battery will wear out faster, waiting for you to repair or replace the machine. machine.

PowerAnts: When the laptop is used as a desktop, do not remove the battery, and replace it if it is broken! It is not the ancestor of the tool. My computer never shuts down, which saves trouble.

se7ens: Similar to the laptop of my family leader, it is said that the lithium battery cannot be fully charged for a long time, which will affect the lifespan. The best state is to keep the power at 70%~80%, which means that it is often shallow and shallow.

lugl4313820: I have used 6 or 7 notebooks before and after, and the battery is no problem. The recent macpros are basically plugged in. It has been 4 years and the battery is similar to the original. Lenovo's Xiaoxin seems to be 6 years old, and there is no problem. It turned out that the worst one used was Shenzhou. After more than two years of use, there was a problem with the motherboard. It can be said: you get what you pay for.

dfwisdom: T430 notebook, the battery has been used for about 4 years. The adapter is basically used in the office, and the battery is used for daily travel or occasions where charging is inconvenient. Now the notebook is using its residual heat, and the battery can only last for half an hour. Need 200 meters, the cost is too high.

bobde163: My laptop has been used for 11 years, and the battery has not been changed. Basically, it is always plugged into the power supply as a desktop computer, and occasionally used for mobile use. When it is set to energy-saving mode, it is still used for about 1.5 hours. The damage to the battery should be relatively small.

Quality problems, aging, improper use... Is this really the case? With this question in mind, we consulted sjl2001, who has some research on batteries, to see how he explained it.

sjl2001

This question just hit the muzzle of my gun. I try not to talk about this as an academic lecture, but there are a few concepts to understand.

Lithium-ion batteries lose a little capacity every time they go through a charge and discharge. Generally, the number of cycles of lithium batteries is 1500-2000 times. The following figure is mentioned in a document. Picture a is the voltage curve at different aging stages, and picture b is the available capacity, also called the state of health. 1 is new battery, 0 is completely scrapped. In fact, it is almost unusable when 80% SOH is used (the scrapped indicator of electric vehicle batteries). Because with aging, the battery capacity decays and the internal resistance increases. The former leads to insufficient available power, and the user experience is that it will be charged in a short time, and it will not take long to charge once. The latter causes the battery to heat up during use.

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