In it's April 2009 employee newsletter, Lockheed Martin has reiterated support for EEStor Inc.'s technology. They are reporting it as having an energy density that is 100X of lead acid.
Management team plans to incorporate
new battery technologies into its products
as they become available. It has
partnered with EEStor, a small company
that has patented ultra-capacitor technology
that MFC believes could be a
game-changing technology in the power
management field. EEStor technology
could provide 10 times the energy density
of lead acid batteries at 1/10th the
weight and volume."