Envia Systems battery – 400 Wh/kg?

Envia Systems’ battery is looking more and more real. 400 Wh/kg at 50% cost is a game changer:

…Envia Systems’ breakthrough battery is one step closer to commercialization after a public vote of confidence last week from the CEO of General Motors (GM), Dan Akerson. ITIF has previously blogged about the battery, which performed at an energy density of 378-418 watt-hours per kilogram (Wh/kg) in independent tests.

…Envia and its battery did not come out of nowhere, of course – they were in large part the product of a supportive energy innovation ecosystem. As related in a previous blog post, the battery was based on technology licensed from Argonne National Laboratory and in addition to funding from GM’s investment arm, Envia received $4 million from the Advanced Research Projects Agency-Energy (ARPA-E) for technology research and development. Furthermore, ARPA-E sponsored testing of the battery at the Naval Surface Warfare Center in Crane, Indiana.