I always keep the tops of my battery's wiped down and clean to minimize dirt tracking between post.
And always jump a battery with cables connected to the positive post on both battery's and the negative connected to the good battery post and ground it on the block or? in order to not spark near the fumes on the dead battery. But I never disconnect anything when I am charging with a charger.
I guess at 70 years old, I have been charging my battery's all wrong after all these years.
. Go figure. Now I am going to use my mig welder and cook a turkey
