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How much do you know about laptop battery maintenance misunderstandings?


It is often said that a newly purchased laptop needs to be fully charged for 12 hours, but this is completely optional. Because current books are mostly lithium-ion batteries, and working principle of lithium batteries is that charging current will be automatically cut off after battery is fully charged, so extra charging time not only has no effect, but may affect battery life due to for a long charging time.

How much do you know about laptop battery maintenance misunderstandings?

1. When using battery for first time, does it need to be charged for 12 hours first three times?

This is completely optional. Because modern laptops have a complete power management scheme and charge management system. When battery reaches saturation, management scheme will automatically switch to a disabled state, so as long as it is fully charged, it does not mean that longer you charge it, longer it can be used. .

Second, to avoid memory effect, should battery be charged before it runs out?

Discharging battery before each charge is unnecessary and harmful. Since experience has shown that deep discharging a battery unnecessarily shortens battery life, it is recommended to charge battery when it is about 10% used. Of course, it is better not to charge when battery is still more than 30% charged, because memory effect does exist.

3. Should battery be removed when connected to AC power to prevent repeated charging and discharging?

My suggestion to you: no! Of course, you can use natural discharge of a lithium-ion battery to refute me, saying that after natural discharge of battery, if there is a power supply, there will be repeated charging and discharging, shortening battery life. And reasons why I give you answer "no" are following:

1. Notebook power plans are designed with this in mind: when battery reaches 90% (for example, most HP models) or 95%, it will charge, and time to reach this capacity naturally discharges from 2 weeks to a month when battery is not used about a month, it needs to be fully charged and discharged to maintain battery capacity. At this time, you should take care to let battery exercise and not recharge after being idle.

2. Even if battery is "unfortunately" overcharged, loss will not be much greater than power drop caused by not using battery for a long time.

3. Your data is much more valuable than your battery or even your laptop. A sudden power failure will not only damage your laptop, but irretrievable data will be too late to regret.

4. Do I need to fully charge battery for long term storage?

Looking at following table will make it clear: (percentage is percentage of saturation state at a given time relative to initial value)

Storage temperature 40% charge level 100% charge level

0 degrees 98% (one year later) 94% (one year later)

25 degrees 96% (one year later) 80% (one year later)

40 degrees 85% (one year later) 65% (one year later)

60 degrees 75% (in a year) 60% (in 3 months)

Obviously, if you want to store battery for a long time, it is best to place it in a dry and low temperature environment and maintain remaining battery chargetorus at a level of about 40%. Of course, it is best to take out battery once a month, which can not only keep battery well, but also prevent it from being completely lost and damaged.

5. How to maximize use of a laptop?

1. Decrease screen brightness. The LCD screen consumes a lot of power, and reducing brightness can effectively extend usage time.

2. Turn on power saving features such as SpeedStep and PowerPlay. Modern laptop processors and display chips have ability to reduce operating frequency and voltage to increase time of use. Enabling this option can significantly increase battery life.

3. Use software to reduce speed of hard disk drive and optical drive: such as NERO DriveSpeed, PowerBooster and other software can reduce speed of optical drive, hard drive and other drives, and effectively reduce the laptop's power consumption. .

4. You can use Master Lu software to check laptop battery details.