IIRC, new batteries contain a semi-liquid electrolyte, which damps the bounce. When discharged, it becomes much more rigid, so the battery bounces. Compare drop

IIRC, new batteries contain a semi-liquid electrolyte, which damps the bounce. When discharged, it becomes much more rigid, so the battery bounces. Compare dropping a gallon jug with ~a cup of water in it vs a cup frozen into ice to see what i mean.