PC runs slow with battery, perfect without

[4ndroid-new]

Hello everyone. I have a strange performance problem with my HP 14-BP081no / HP 14-BP0xx / HP 14-Bp000 laptop from 2017.

In summary, the laptop performs slow while it's on battery, or while connected to AC and charging, or while being on AC with a fully charge. The laptop performs splendid with the battery disconnected, while being on AC power.

With slow, I mean that it's stuttering a lot, thinking long and taking time opening programs and loading sites in the browser. But it manages to do everything I want, just slow and stuttering.

The task manager shows low % of the cpu and ram, like it can be on 20% for example, but still the laptop is stuttering. This stuttering and slowness disappears with the battery being disconnected.

I do not think the power cable, or that the battery, is the issue.

This is why:
I have a completely identical laptop, bought at the same time in 2017, with identical cable, this computer performs perfect. Like the one with the issue but without the battery plugged in.

Both have all drivers, windows updates, hp support assistant, up to date. Both are reinstalled without any other programs or files. The only diffrende is that the one with the problem runs bios F.42 Rev.A, realeased Dec 18, 2020, and the good one runs bios F.13 Rev.A, realeased Nov 13, 2017. The bios is reseted. The power plans have been tried with different variation, max efficency, balanced etc. Both have ram upgraded from 6 to 16 GB (yes it's the right ram, 2+4=6 gb ram 2133 MHZ to 8+8=16 gb 2133 MHZ, on both of them). Fans etc are cleaned, new thermal paste is in place. Still the same performance.

I have tried to, in different steps and in combinations, to swap the ssds, the fans, the heat sink, the batteries, and the power cable, between the computers.
The good one runs equally good, and the bad one runs equally bad.

It seems like something else is throttling the bad performing computer while the battery is plugged in. I repeat that I have swapped the batteries and power cable, and this does not affect the performance on any of them.

I notice that the bad one charges both batteries slower, tried this with both cables. The good one charges both batteries good. For example, when I charged them from 85 to 100 % while being turned off, the slow one took 55 minutes longer to complete the charge.

I have also tried to uninstall and install the "Microsoft ACPI-Compliant Control Method Battery" driver, with no effect.

I repeat that the bad one has the latest bios, but this can not be downgraded and the bios advanced settings are locked. Swapping the chip is complicated.

I repeat that it runs good without the battery.

I wanted to buy a new battery, but I don't see the point when the good computer runs good with both batteries. The same for the cables.

Strange yes? What else can I try?

[BeemerBiker]

I had to ask Google;'s AI about this

A laptop can run slow while charging its battery because of several reasons, including: power settings set to a "balanced" or "power saving" mode while plugged in, a charger that isn't powerful enough for the laptop, an aging battery with reduced capacity, or background processes that activate when charging, which can consume system resources. [1, 2, 3, 4, 5]

Key points to consider: [1, 3, 5]

• Power settings: Check your power plan settings to ensure it's set to "High Performance" when plugged in, as power saving modes can intentionally slow down the processor while charging to conserve battery life. [1, 3, 5]
• Charger compatibility: Make sure you are using the correct charger designed for your laptop, as a weaker charger might not provide enough power to run the system smoothly while charging. [2, 6]
• Battery health: An old or damaged battery can experience slower charging times and may impact performance while plugged in. [3, 7, 8]
• Background processes: Some applications might activate additional processes when the laptop is plugged in, which can use up system resources and slow down performance. [1, 4]

What to do: [1, 3, 9]

• Adjust power settings: Go to your operating system's power settings and select "High Performance" mode when plugged in. [1, 3, 9]
• Check your charger: Ensure you're using the original charger that came with your laptop. [2, 10]
• Monitor battery health: If you suspect your battery is old, consider replacing it. [3, 7, 8]
• Manage background applications: Close unnecessary programs running in the background while charging. [1, 10]
• Update drivers: Check for any available updates for your battery drivers. [7, 9]

Generative AI is experimental.

[1] https://www.quora.com/Why-does-my-laptop-get-slow-when-I-plug-in-the-charger

[2] https://support.microsoft.com/en-us/windows/pc-is-charging-slowly-or-discharging-while-it-s-plugged-...

[3] https://www.anker.com/blogs/chargers/how-long-does-it-take-to-charge-a-laptop

[4] https://www.asus.com/in/content/dos-and-donts-while-charging-your-laptop/

[5] https://help.ubuntu.com/stable/ubuntu-help/power-batteryslow.html.he

[6] https://www.anker.com/blogs/chargers/how-many-watts-does-a-laptop-charger-use

[7] https://www.quora.com/Why-does-my-laptop-says-0-available-plugged-in-charging-but-actually-the-batte...

[8] https://montclairgateway.org/laptop-always-plugged-in-charging-what-is-the-effect-on-the-battery/

[9] https://answers.microsoft.com/en-us/windows/forum/all/why-is-my-laptop-lagging-while-its-plugged-in/...

[10] https://www.xda-developers.com/speed-up-slow-charging-laptop/

----

Look at the good and bad system for startup applications.  Generally, you can disable all apps in startup. If this make a big difference, then enable one at a time until you find the one or ones causing the problem.

[4ndroid-new]

Thank you for your Google check.

As mentioned, I find it very odd that the faulty computer struggles with both batteries, while the good computer accepts them equally well without any issues. The same applies to the power cables.

Both computers have been freshly reinstalled and don’t have any programs running at startup. This leads me to conclude that investing in a new battery won’t solve the problem. The only noticeable difference between the two is the BIOS version.

Do you have any other ideas?