Re: how to limit battery charge level and/or edit uefi settings

[Henry <nbsd4ever%gmail.com@localhost>]

Thank you both, Greg and Ryo.

Rest at peace; the very first thing I did after discovering the
battery was dead, was to replace it.  This was even before my original
post, which was composed in shock and panic mode.

Unfortunately, the only way to get the HP battery protection function
is to update the BIOS.  All methods require a working Windows.  See:
https://support.hp.com/in-en/document/ish_3932413-2337994-16
Even more unfortunate is that my only option, using the
key-combination method and a recovery USB, doesn't work.  NetBSD boots
no matter what.  I suspect that NetBSD overwrote/changed the EFI
environment.  The only way I can see to update the BIOS would be to
switch out the disk with one that has Windows installed.  It's just
not practical for me to do that.

So one last question, is there some way within NetBSD userland
(including software in pkgsrc) to maintain the battery charge level
between the recommended 20% to 80%?

Thank you both again, and thank you NetBSD Users for all your input and help.

Henry

2025年10月18日(土) 9:18 Ryo ONODERA <ryo%tetera.org@localhost>:
>
> Hi,
>
> On October 17, 2025 9:33:47 JST, Henry <nbsd4ever%gmail.com@localhost> wrote:
> >Hello NetBSD Users,
> >
> >My battery has been overcharging and has begun to bloat.  This is on
> >an HP Pavilion laptop  15au123cl running NetBSD 10.1.
> >
> >Apparently there is a way to limit the battery charge level in
> >something called "Adaptive Battery Optimizer" in the "UEFI Firmware
> >Settings", but the only way I have found to access this is via
> >Windows, which I cannot go back to since I wiped the disk to put on
> >NetBSD.
>
> I have used many laptops from HP.
> And I have no experience to require Windows
> to enter UEFI firmware/BIOS settings.
>
> User guide of HP Pavilion - 15-au123cl
> has common description as follows:
>
> > Turn on or restart the computer, quickly press esc, and then press f10.
>
> You can download the user guide from here:
>
> https://support.hp.com/us-en/product/setup-user-guides/hp-pavilion-15-au100-notebook-pc/model/12780759
>
> And if you want to run Windows without
> wiping NetBSD, Windows To Go USB stick is
> useful. You can easily use Windows To Go
> USB stick with Rufus for Windows.
>
> https://rufus.ie/en/
>
> Sadly it requires a working Windows environment.
>
> Thank you.
>
> >I would be grateful if someone has pointers on how to limit the
> >battery charge level on this laptop.
> >
> >As always, thank you all very much.
> >
> >Henry
>
> --
> Ryo ONODERA // ryo%tetera.org@localhost
> PGP fingerprint = 82A2 DC91 76E0 A10A 8ABB  FD1B F404 27FA C7D1 15F3