TheEEStory.com

Here's an interesting graph:

It appears to lose its 45ah capacity after just a few cycles, so it seems like a stretch to describe this as a 45ah cell. If you'll settle for 25 AH, it should be good for 450 cycles or so. This makes me think that for all practical purposes, they've only achieved 200 watt-hours per kilogram, but maybe the longevity will improve before it comes to market.

Source: http://enviasystems.com/announcement/