> my System76 Galago Pro had its second experience with a dead/swelling battery.
I used to have a Dell laptop which had exactly the same problem with my first battery. Running laptop plugged into AC adapter 99% of the time was one reason for that happening, I imagine.
Fix was ridiculously simple - I bought a new battery (original) + a knock-off power adapter (a more expensive one - hoping it's built well enough so it wouldn't burn my house down - and as luck had it, it didn't). Knock-off adapter doesn't speak magic Dell charging protocol, so laptop runs off of it, but refuses to charge.
I kept original AC adapter for (infrequent) travel only, all the other time powering from a knock-off. Worked a charm - second battery held something like 90% of charge 3 years later, with no signs of swell whatsoever. Compare that to first battery, that lived on constant top-up charge (original adapter), and after less than a year swell up to the point it wouldn't clip in anymore.