hp envy battery

[torx5]

As I bought an HP ENVY 13-ad173cl in November 2018, I replaced the battery in 2021, yet when its capacity was almost gone by September 2024 I decided to simply remove it as I am mostly using the laptop at home. Then I noticed that I could not initiate wsl2 and found out that there was no CMOS battery on that model despite Zach Cabading's article FAQ :    Do laptops have CMOS batteries?

Yes, laptops do have CMOS batteries. https://www.hp.com/us-en/shop/tech-takes/what-is-cmos-battery-how-to-remove-and-replace

Since wsl2 requires virtualization, I then had to figure out when to invoke F10 as getting a BIOS checksum error on powerup (due to the absence of battery) that induced a second BIOS initialization that turned out to be when to invoke F10 and enable virtualization. As waiting for borophene anodes (or LFPO iterations tolerating over 60°C (140°F) or better solution get a new laptop if CMOS batteries are out of fashion... 

[erico]

In modern laptops, the BIOS chip gets its power from the main battery.

I have no idea as to why Zach Cabading is writing about old RTC battery tech as if it were used in HP's current laptops.

You need to replace the battery with a new genuine HP part numbered battery.

The Maintenance & Service guide for your laptop model series

https://h10032.www1.hp.com/ctg/Manual/c05638816.pdf

Description and HP Part number

3-cell, 51-WHr, 4.45-AHr, Li-ion 921439-855

HP PartSurfer data (all part are specific to your laptop)

https://partsurfer.hp.com/?searchtext=1KT13UA

It is highly recommended to purchase and install only Genuine HP part numbered batteries. "Compatible" batteries have been known to not always operate as expected

Online vendors

https://www.google.com/search?q=genuine+HP+921439-855&sca_esv=fbf738c26e1a574b&ei=2rsCZ5ryIuCRwbkP0p...