> This is important to keep in mind when you read articles and/or studies about how electric cars or wind or solar power is impractical. A lot of the data these studies use is just obsolete.

My understanding is that phone batteries are extremely different from batteries for large storage. They have vastly different cycle and draw requirements (you can't quick draw on your phone battery). I don't think these studies are being nefarious, but looking at different batteries, where this article is averaging. Reading the article it doesn't give any inclination that they are differentiating these types of batteries.