starter check?

moparLeo,could you tell me why I would remove the batt. for charging?I,ve been working on these old things for a lot of years,never pulled batt. to charge.just pull the ground cable off batt. and put charger on.allways ready to learn something new,please alliterate:steering:.
Theres a couple reasons,the gases it emits while charging is corrosive,and if exposed to an arc,can cause explosion.
Moreso if battery is bad.
Been there done that. Charger must be off or unplugged when connecting or disconnecting to battery. Safety first.