How common is it to have a laptop with 2 batteries?

I used to work at a library, and about 10% of the books had a pleasing aroma, and the other 90% smelled like literal ass.

Wow, thank you so much for taking the time to answer. I really do appreciate it.

Going off of what you said, I am going to take what I currently have, scale it back, and attempt to get more separation between services.

Again, thank you!