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Kinh Nghiệm Hướng dẫn Is it bad to keep máy tính connected to power? Mới Nhất
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Tóm lược đại ý quan trọng trong bài
- You Cant Overcharge the Laptops Battery
- All Batteries Wear Down Over Time (For a Few Reasons)
- Remove the Battery to Avoid Heat, if You Can
- But Should I Leave It Plugged In or Not?
- Occasional Discharge and Recharges Can Help Calibrate the Battery
Should you leave your máy tính plugged in and charging when youre not on-the-go? Whats best for the battery? Its a tough question, and there are quite a few contradictory recommendations out there.
You Cant Overcharge the Laptops Battery
RELATED: Debunking Battery Life Myths for Mobile Phones, Tablets, and Laptops
Its important to understand the basics of how the standard lithium ion (Li-ion) and Lithium polymer (LiPo) batteries in modern devices work. There are a lot of battery myths out there.
Theres no way to overcharge these batteries. When you get to 100% charge and leave your máy tính plugged in, the charger will stop charging the battery. The máy tính will just run directly off the power cable. After the battery discharges a bit, the charger will kick into gear again and top the battery off. Theres no risk of damaging the battery by charging it over its capacity.
All Batteries Wear Down Over Time (For a Few Reasons)
Your máy tính battery will always wear down over time. The more charge cycles you put the battery through, the more it will wear down. Different batteries have different ratings, but you can often expect about 500 full charge cycles.
That doesnt mean you should avoid discharging the battery. Storing the battery at a high charge level is bad for it. On the other hand, letting the battery run down to completely empty every single time you use it is also bad. Theres no way to just tell your máy tính to leave the battery at about 50% full, which might be ideal. On top of that, high temperatures will also wear down the battery more quickly.
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In other words, if you were going to leave your máy tính battery in a closet somewhere, it would be best to leave it at about 50% charged capacity and make sure the closet was reasonably cool. That would prolong the batterys life.
Remove the Battery to Avoid Heat, if You Can
Heres one clear thing: Heat is bad. So, if your máy tính has a removable battery, you may want to remove the battery from the máy tính if you plan on leaving it plugged in for a long time. This will ensure the battery isnt exposed to all that unnecessary heat.
This is most important when the máy tính runs very hotlike a powerful gaming máy tính running demanding PC games, for example. If your máy tính runs fairly cool, you wont see as much benefit from this.
Of course, many modern laptops dont have removable batteries anymore, so this tip wont apply in those cases.
But Should I Leave It Plugged In or Not?
Ultimately, its not clear which is worse for a battery. Leaving the battery at 100% capacity will decrease its lifespan, but running it through repeated discharge and recharge cycles will also decrease its lifespan. Basically, whatever you do, your battery will wear down and lose capacity. Thats just how batteries work. The real question is what makes it die more slowly.
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Laptop manufacturers are all over the place on this. Apple used to advise against leaving MacBooks plugged in all the time, but their battery advice page no longer has this piece of advice on it. Some PC manufacturers say leaving a máy tính plugged in all the time is fine, while others recommend against it with no apparent reason.
Apple used to advise charging and discharging the laptops battery at least once per month, but no longer does so. If youre concerned about leaving your máy tính plugged in all the time (even if its a PC máy tính), you might want to put it through a charge cycle once per month just to be safe. Apple used to recommend this to keep the battery juices flowing. But whether this will help depends on the device and its battery technology, so theres really no one-size-fits-all answer.
Occasional Discharge and Recharges Can Help Calibrate the Battery
RELATED: How to Calibrate Your Laptop’s Battery for Accurate Battery Life Estimates
Putting your máy tính through an occasional full charge cycle can help calibrate the battery on many laptops. This ensures the máy tính knows exactly how much charge it has left and can show you an accurate estimate. In other words, if your battery isnt calibrated properly, Windows may think you have 20% battery left when its really 0%, and your máy tính will shut down without giving you much warning.
By allowing the laptops battery to (almost) fully discharge and then recharge, the battery circuitry can learn how much power it has left. This isnt necessary on all devices. In fact, Apple explicitly says its no longer necessary for modern MacBooks with built-in batteries.
This calibration process wont improve the batterys lifespan or make it hold more energyit will only ensure the computer is giving you an accurate estimation. But this is one reason you wouldnt to leave your máy tính plugged in all the time. When you unplug it and use it on battery power, it might show you incorrect battery life estimates and die before you expect it to.
Your laptops battery isnt going to last forever, and it will gradually have less capacity over time no matter what you do. All you can do is hope your laptops battery lasts until you can replace your máy tính with a new one.
Of course, even if the capacity of your laptops battery declines, youll still be able to keep using it while plugged into a power outlet anyway.
Image Credit: Intel Free Press
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