Lo is LOW OHMS - yes they can change with just the action of connecting/removing an addy/carto/etc. or just Vaping.
Just last week I killed a Riva 650Mah battery with a Smok 1.7 shorty that shorted mid vape after the carto was 1/2 empty.
Coils expand/contract and can cause excessive loads if over heated or improperly built