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 <[email protected]>: > > Hi, > > On October 17, 2025 9:33:47 JST, Henry <[email protected]> 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 // [email protected] > PGP fingerprint = 82A2 DC91 76E0 A10A 8ABB FD1B F404 27FA C7D1 15F3
