ZENN recently reported that a third party had certified an important technology milestone reached by EEStor.  Independent tests showed that…

…the main material in the ultracapacitor technology achieved relative permittivity of at least 22,500 over an operating range of -20 to +65 degrees Celsius. Permittivity is a measurement of how much energy can be stored in a material.

Per the agreement with EEStor, reaching the milestone triggers an additional $700,000 payment by ZENN and an opportunity to increase their equity stake.  The next milestone is to commercialization of the technology, which according to the agreement, is supposed to start by the end of 2009.  ZENN still plans to incorporate the ultracapacitor technology in vehicles in 2010.  Learn more:  cleantech.com