Sooo, I just swapped my charger with my mother's charger. Hers didn't charge my S5 at all, and mine charged her Core and the battery worked fine. I mean, how can the charger affect the battery AFTER it has been disconnected? There must be something I'm ignoring here.
Yup, when it started to happen it had the original battery and the other batteries I bought, I compared them with that one and the guidelines that Samsung specifies here Use Samsung-approved batteries, chargers, accessories, and supplies