Does charging while using the laptop damage the battery?

[Newblesse Obblige]

You know the "Do not use your phone you are charging it" thing right? does it also apply on laptops? But in laptops, especially gaming laptops, you cant avoid it since it boost the performance of the laptop as it give more power and the CPU and GPU can stretch more freely rather than limiting their power for battery life. 

[Enderman]

There is nothing that says you can't use a phone while charging it.

That's a myth.

[Newblesse Obblige]

1 minute ago, Enderman said:

There is nothing that says you can't use a phone while charging it.

That's a myth.

but does it damage the battery or it is also a myth?

[DrMacintosh]

It only would damage the battery if you exceeded the power supplies output and the laptop had to draw from the battery and the brick combined. 

[TomvanWijnen]

4 minutes ago, DrMacintosh said:

It only would damage the battery if you exceeded the power supplies output and the laptop had to draw from the battery and the brick combined. 

Why would that damage the battery?

[Newblesse Obblige]

2 minutes ago, DrMacintosh said:

It only would damage the battery if you exceeded the power supplies output and the laptop had to draw from the battery and the brick combined. 

if I understand your words correctly, if I plug a power brick to the laptop, it doesnt draw power from the battery anymore and it charges the battery at the same time but it overcharges it right?

[Newblesse Obblige]

1 minute ago, TomvanWijnen said:

Why would that damage the battery?

overcharging? like if you game for hours and the battery is already full last 2 hour ago.

EDIT: nevermind

 

[DrMacintosh]

8 minutes ago, TomvanWijnen said:

Why would that damage the battery?

BC you are charging the battery and then draining it in rapid succession. Very bad. 

[kydew]

25 minutes ago, 5GigaaHertz said:

You know the "Do not use your phone you are charging it" thing right? does it also apply on laptops? But in laptops, especially gaming laptops, you cant avoid it since it boost the performance of the laptop as it give more power and the CPU and GPU can stretch more freely rather than limiting their power for battery life. 

 my battery on my gaming laptop died lol, because i used it and charged it al the time

[Cyracus]

Yes it is bad for the battery, but unlike most phones these days you can replace the battery so not as great a concern

[Enderman]

33 minutes ago, 5GigaaHertz said:

but does it damage the battery or it is also a myth?

No it does not damage anything.

 

30 minutes ago, DrMacintosh said:

It only would damage the battery if you exceeded the power supplies output and the laptop had to draw from the battery and the brick combined. 

Um no.

16 minutes ago, DrMacintosh said:

BC you are charging the battery and then draining it in rapid succession. Very bad. 

I don't think you understand how electricity works.

If you have a charger that is wired to a battery, and you draw more power than the charger supplies, the device pulls current from both the charger and battery.

It does not "charge and discharge" the battery, it only discharges the battery.

 

In fact it discharges the battery slower than if there was no charger connected, since the charger supplies the majority of current necessary.

So really it "damages" the battery less than just using it normally does.

 

Also, 99% of devices these days come with a charger of higher wattage than the device draws, so even at full load the charger would be supplying 100% of current while also charging the battery, just slower.

[DrMacintosh]

1 minute ago, Enderman said:

It does not "charge and discharge" the battery, it only discharges the battery.

Except it does. There are multiple Laptop models that overdraw power and you can watch as the battery indicator drains and fills up, drains and fills up while on the wall. I believe this can happen on 2019 15 MacBook Pros with dGPUs. 

 

[Helpful Tech Witch]

42 minutes ago, 5GigaaHertz said:

You know the "Do not use your phone you are charging it" thing right? does it also apply on laptops? But in laptops, especially gaming laptops, you cant avoid it since it boost the performance of the laptop as it give more power and the CPU and GPU can stretch more freely rather than limiting their power for battery life. 

No. The phone thing is a true thing, but it pertains to ruining the charger.

36 minutes ago, DrMacintosh said:

It only would damage the battery if you exceeded the power supplies output and the laptop had to draw from the battery and the brick combined. 

No. It pulls wall power and battery at the same time, its just like using it just on battery.

24 minutes ago, DrMacintosh said:

BC you are charging the battery and then draining it in rapid succession. Very bad. 

No. It pulls the power through the system, and any other power from the charger is put into the battery.

4 minutes ago, DrMacintosh said:

Except it does. There are multiple Laptop models that overdraw power and you can watch as the battery indicator drains and fills up, drains and fills up while on the wall. I believe this can happen on 2019 15 MacBook Pros with dGPUs. 

 

Well what else would you expect from a MacBook?

 

22 minutes ago, Rafizia said:

my battery on my gaming laptop died lol, because i used it and charged it al the time

Gaming laptops are designed to be used on charger. The battery probably had too many charge cycles. It died completely and recharged too many times.

37 minutes ago, 5GigaaHertz said:

if I understand your words correctly, if I plug a power brick to the laptop, it doesnt draw power from the battery anymore and it charges the battery at the same time but it overcharges it right?

No. Once it has a full battery, it will no longer charge, if it is designed well. Don't use a MacBook as a example, I'll remind you that they made a MacBook that is notorious for cooking itself to death.

[Newblesse Obblige]

1 hour ago, TheTechWizardThatNeedsHelp said:

Gaming laptops are designed to be used on charger. The battery probably had too many charge cycles. It died completely and recharged too many times.

No. Once it has a full battery, it will no longer charge, if it is designed well. Don't use a MacBook as a example, I'll remind you that they made a MacBook that is notorious for cooking itself to death.

when did laptops have this feature? does every windows laptop have this feature?

[Helpful Tech Witch]

8 minutes ago, 5GigaaHertz said:

when did laptops have this feature? does every windows laptop have this feature?

https://www.howtogeek.com/124715/should-i-leave-my-laptop-plugged-in-all-the-time/

[Enderman]

13 hours ago, DrMacintosh said:

Except it does. There are multiple Laptop models that overdraw power and you can watch as the battery indicator drains and fills up, drains and fills up while on the wall. I believe this can happen on 2019 15 MacBook Pros with dGPUs. 

 

1) Um, no, I've never heard of a single device doing that ever. If it happened to all macbooks I'm sure it would be a more well known issue, but I can't find any posts about it. Maybe you can post a few examples of people this has happened to?

 

2) The way a battery works in combination with a charger is essentially parallel connection, so it is impossible for it to drain and fill up unless the charger was reducing and increasing its output. If the charger outputs a constant wattage then the system either uses less than that (drawing <100% from the charger and the rest charges the battery during use) or it uses more than that (and the battery drains during use as the system draws 100% from the charger plus some % from the battery).

 

3) The only other way the battery % could go down and up repeatedly is if for some reason the device could not draw power from the charger and could only use battery, in that case it would drain the battery and then the charger would refill it once it hit 95% or whatever and then it would draw from the battery again. This is a flawed design and no modern device has this problem unless there is an issue with the charging circuit.

 

4) Even if a device did have shitty circuitry that would constantly switch between battery and charger power (which no modern design does) the batteries used inside phones and laptops are LiPOs, which do not have a memory effect like NiCAD. This means you can discharge it 10% and recharge it and that only counts as 10% of a battery cycle, not an entire battery cycle. Discharging it 100% and recharging it would have the same effect as discharging it 10% ten times. So no that also does not cause damage to the battery.