“my god it’s full of tiny holes”

It’s way easier than spelling “envelope”, that’s for sure.

That’s simply how physics works. A run-of-the mill battery - a pos and neg electrode and the “goo” that make the electricity - can only ever produce about 1.5 volts so 6 batteries connected in series (pos to neg to pos to neg) yields 6*1.5 = 9v.