Is this technology more/less dense than current lithium cells? Will it mean less/more weight in an automotive application?

Wasn't it Edison who came up with this battery? The moneytards have screwed us for years this is clearly a case of business killing the environment for cash. Ive always wondered what the human body needs iron for.

I would also like to know the weight ratio. Will it be better or worse than current lithium batteries?

Converting scrap metal old vehicles into new energy storage, now that's renewable!

re; MasterG
Edison improved the nickle-iron battery.
At the center of every red blood cell there is an Atom of iron with out it the cell can not carry oxygen.

At last a 12 year life battery.

the weight is significantly better than lithium ion but as far as im aware the number of recharges of these is only in the hundreds, while lithium ion is in the thousands.

I recall an article a couple of weeks ago highlighting a commercial operation that manufactures iron air batteries. They might have even had some arp-e funding. My hat's off to USC scientists if they have accomplished what this article claims. This was in fact Edison's idea.... but apparently they've improved it significantly. Back to the future.

Power to weight ratios don't really matter for utility storage applications. All that matters is durability, and capacity/$. If they can really produce a battery that is 6x cheaper than lithium ions, this could make renewable resources our primary power generation technology.

MasterG is correct- Edison nickel-iron battery was "current" in the 1900's for electric cars. See "nickel-iron battery" in Wikipedia for details. They were manufactured up to 1975 for stationary applications like railroad signals. Main advantage was economy, but they had relatively low power density.