As the battery life on my notebook appears to grow less and less with every recharge, Iâ€™ve come to wonder if leaving my laptop plugged in all the time has taken an effect. I know there are many out there who are probably experiencing the same issue, so I decided to do a little research on the subject and came across an interesting article directly addressing this issue.
The truth is that laptops and laptop batteries are designed with the intent that they are plugged in as often as possible. In fact, most manufacturers suggest leaving them plugged in all the time. The heat you feel from the bottom of a laptop that’s been running all day doesn’t really have anything to do with whether it’s plugged in or not. Laptops get hot due to their internal components and the chemical reaction in the battery. The A/C charge has very little to do with it.
Will leaving it plugged in decrease its useful life? The short answer is no, at least not enough that you’re likely to notice. Lithium-ion batteries have no “memory effect” like nickel-based batteries, so there’s no worry about plugging them back in before they’re completely drained. But like all batteries, lithium cells lose capacity over time. The more they are drained and recharged, the more their internal structure warps, and they eventually become unusable. This happens due to heat, and since your battery gets hot even when it isn’t discharging, as long as you have it installed in a running computer, it’s going to be affected to some extent.
There you have it folks. It seems that there isnâ€™t a noticeable loss in battery life by leaving your laptop plugged in. The constant draining and recharging of the battery is what actually lessens the life of your battery. But if you still believe leaving your laptop plugged in is killing your battery then here is a solution:
If you turn off your laptop at night and unplug it, or if you run your laptop plugged in, without a battery installed, that battery would last slightly longer when you do eventually start using it (so long as you keep it properly charged most of the time). However, the extra lifespan you gain is not even remotely worth the extra hassle in doing all this work.
Bottom line: Leave your notebook’s battery installed, and plug it in as often as you can.
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