[ERA Chas]

Thanks for answering the call Blas.
To be clear-this is not a Cobra-it's my daily driver. Battery in left front. Grounds are OEM and fine. Battery not hot. Don't have another batt to try in its place-my other car uses larger size.
No sweet smell. Yes, I'm careful about venting fumes.
Haven't tried the battery on a charger out of the car. I'm just not sure it's bubbling out or the vent system is siphoning it out.