That was back in 2009. The range for tech grade LCE was about 2 - 3kg = 1kwh. By about 2013, and using battery grade LCE this had dropped to .9 to 1.3kg = 1 kwh. Changes in cathode/anode tech and the processes employed improved the ratio. I think there are a few discussions on the web about this, since I think I got it a year or two ago with a simple search.
GXY Price at posting:
$1.28 Sentiment: Buy Disclosure: Held