It looks like Lockheed Martin is adding credibility to EEStor's claims by announcing an investment in their technology. Terms were not disclosed. From the article on CNET:
EEStor is developing a ceramic battery chemistry that could provide 10 times the energy density of lead acid batteries at about a tenth of the weight and volume, according to Lockheed. A Lockheed spokesman said the company is interested in energy storage systems a soldier can carry, but also car batteries and energy systems for remote buildings.