Ok to remove built-in Lenovo laptop battery?

It's not the CMOS battery that's in question here...

I understand that. Perhaps you've misinterpreted what I meant.

when you referred to the CMOS battery but didn't actually mean the CMOS battery - of course! I see now.

not exactly
I simply meant that if it were me, that's all. It's in the first line.

Megahertz said:

Some laptops with internal battery doesn't have the CR2032 BIOS battery as the needed power is provided by the main battery.

Would that mean that removing the main battery would also be like removing the CMOS battery? That doesn't sound good. Oh well, it's already done.

A weird thing that I noticed (unrelated to the battery) is that when I had the laptop's bottom cover open, I couldn't find where the SSD drive was. I could see where it should be, but there was just a space there. Then I went back to the video tutorial again that showed how to open up the computer to change the battery, and it shows the same thing I saw; no SSD: Lenovo IdeaPad 3 15IIL05 How to Battery Replacement Disassembly - YouTube

It should be in the square silver area in the upper right.

Berton said:

What I see in that video is that the silver area is for a SATA SSD drive but it may actually have an NVMe SSD drive that I don't see, probably covered by something else. Both types the drives are SSD/Solid State Drive but the NVME and SATA are different mountings. The NVMe will be shorter than in this image, maybe just about 1.5", one of mine is.

I've never seen one like that before. I thought they were all SATA. Things are changing so fast! :)

Delly10 said:

I've never seen one like that before. I thought they were all SATA. Things are changing so fast! :)

NVMe SSDs were launched 10 years ago.