What happends when laptop hits 100% battery and is still on a charger?

djuk1c · 2023-02-16 21:17:34

Subject sums it up, i am wondering what is happening when i charge my battery up to 100%, and leave it on a charger?
Is the charger then powering the system, while battery sits unused, or is it topping up the battery every time it drops under energy_full?

If needed, this is my laptop: 82LN IdeaPad 5 15ALC05
Also, is it bad for my battery to leave it 24/7 on a charger while i am home?

seth · 2023-02-16 21:45:46

is it bad for my battery to leave it 24/7 on a charger while i am home?

Yes. It's about the fastest way to kill it (that does not involve an sledgehammer)

Is the charger then powering the system, while battery sits unused

Does the device work on the external power w/ the battery removed?

If you're sitting next to a charger, try to keep the battery between 20% and 80% load.

860lacov · 2023-02-16 22:05:11

djuk1c wrote:

Subject sums it up, i am wondering what is happening when i charge my battery up to 100%, and leave it on a charger?
Is the charger then powering the system, while battery sits unused, or is it topping up the battery every time it drops under energy_full?
If needed, this is my laptop: 82LN IdeaPad 5 15ALC05
Also, is it bad for my battery to leave it 24/7 on a charger while i am home?

It probably has Li-Ion battery.
Those batteries are quite resistant to usage - charging/discharging.
I'm not sure about %
But the best condition to keep them safe i to charge them to around 50%.
If it's possible, just charge the battery to around 50% and remove it from the laptop.

If you can't. You could disconnect laptop from time to time and discharge it. I think (not sure) that it could help keeping it in fairly good condition (for some time).

djuk1c · 2023-02-16 22:07:14

It's a Li-poly L19C4PF1 (model_name) battery

djuk1c · 2023-02-16 22:14:39

seth wrote:

is it bad for my battery to leave it 24/7 on a charger while i am home?
Yes. It's about the fastest way to kill it (that does not involve an sledgehammer)
Is the charger then powering the system, while battery sits unused
Does the device work on the external power w/ the battery removed?
If you're sitting next to a charger, try to keep the battery between 20% and 80% load.

Ive got a completely different response form another guy, telling me that i'd drain the battery down much less if i kept it on a charger for longer time, then charging and discarging it for the same amount of time.

While connected to a charger, the battery generally isn't used at all, and the power is coming entirely through the charger. Once the battery hits 100%, it will stop drawing power to charge it unless it drops below 100%, then it will bring it back up to full. It will continue to power the system, bypassing the battery as long as it is plugged in.

Last edited by djuk1c (2023-02-16 22:16:10)

seth · 2023-02-16 22:33:50

And still you came here, I guess because you ddin't trust the advice?

another guy wrote:

While connected to a charger, the battery generally isn't used at all

That's a pretty bold claim.

seth wrote:

Does the device work on the external power w/ the battery removed?

another guy wrote:

Once the battery hits 100%, it will stop drawing power to charge it unless it drops below 100%, then it will bring it back up to full.

Yeah, no shit sherlock.
The problem is that the more the battery is charged, the more mechanically and thermically stressful the loading becomes.
Constantly loading it at the top end is the worst possible thing you can do to it.

You want to run it at flat cycles.
Whether the system is powered through the battery or bypassing it highly depends on the system.
If you can remove the battery an run the system on the external power only, that'd be about the best way to use it (for the battery) - if anotherguy™ claims to have knowledge about how exactly the system behaves and whether the external supply can and will indeed bypass the battery, I'd ask him to cite the source for that.

I don't know whether it can.
Typically, all power is run through the battery and in that case, keeping the battery on constant charge is the fastest way to kill it.

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#1 2023-02-16 21:17:34

What happends when laptop hits 100% battery and is still on a charger?

#2 2023-02-16 21:45:46

Re: What happends when laptop hits 100% battery and is still on a charger?

#3 2023-02-16 22:05:11

Re: What happends when laptop hits 100% battery and is still on a charger?

#4 2023-02-16 22:07:14

Re: What happends when laptop hits 100% battery and is still on a charger?

#5 2023-02-16 22:14:39

Re: What happends when laptop hits 100% battery and is still on a charger?

#6 2023-02-16 22:33:50

Re: What happends when laptop hits 100% battery and is still on a charger?

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