An article is not a puff piece simply because it casts something in a good light. This article is largely a transcription of the images from the linked report,

An article is not a puff piece simply because it casts something in a good light. This article is largely a transcription of the images from the linked report, and also addresses a common counter argument, “the power plants are dirty”. Batteries as energy storage/source are a related but entirely separate concern from the ratio of energy in to energy out (the focus of the article). I also find it interesting to replace “precious metals” in your comment with “fossil fuels”, which also require destructive mining and have limited volume.