750
New sodium ion battery stores twice the energy and desalinates seawater
(www.sciencedaily.com)
This is a most excellent place for technology news and articles.
Yes, I am very intrigued. For something the size of half a shipping container I could power my house for almost a month. This is of course fantasy because I don't have $20,000 to throw down. But combine it with solar cells that have gotten really cheap and you could indefinitely power your house for next to nothing.