

Perhaps more modern ones, but the ones in my last and current laptops are both 18650s. 6 cells, 9 cells, you stack in series to increase voltage, parallel to get more capacity, so a 3s2p would have ~14V which is more than the required 12V for internal components, no boost converters needed. That said, now they do a lot of pouch batteries which are actually multiple internal pouches run in series to get the same sort of voltage but made with the chassis fitting them perfectly, no wasted space.
Honestly, I haven’t tried backing up and restoring but it seems likely to work. I have however brought game files across and after copying them over I added them to Steam and the verified the files. It seemed to fix the permissions and ownership quite well, though that could have been luck.