Is it normal for a battery to smell like acetone?

A couple of weeks ago my Pixel 6 (~3 years old) started giving off an acetone smell, and based on some Googling, I suspected it might be a battery issue. Yesterday, I replaced the battery using the kit from iFixit, and noticed that the replacement battery gave off a similar smell, though not quite as strong. Nothing appeared to be wrong with the replacement (no visible damage or swelling). Is it normal for them to have a bit of an odor?