On Sun, 18 Aug 2013 11:35:19 +0100, "Gareth Magennis"
wrote:

Is it not more the case that the amount of bounce has more to do with the
shock waves moving through the medium inside the battery, rather than the
actual mass of the battery?

Yes, exactly. Gas is compressible and elastic, while liquids are not.
Try filling a football with water and see the difference.

In Kip Kay's video which Dave Jones refers to, it is also mentioned:
http://kipkay.com/episodes/amazing-w...est-batteries/
--
RoRo