You don't really say whether the dead cylindrical batteries were heavier or lighter than the charged versions, but from you sentence about 9V batteries, I will infer the dead cylindrical batteries were lighter.All the single cell batteries followed the drop test. By dropping about 1/2 to 1", it was easy to determine full charge, half charge and dead. On hard oak desk.
The most notable difference is weight. I didn't get my scales out, because the difference was quite noticeable just by picking them up. No drop needed.
However........the 2 dead 9 volt batteries were heavier then the good one.
by Duane Benson
by Jake Hertz
by Duane Benson
by Duane Benson