I don't think you have any basis to say it is "quite easy" based off that article. You obviously can just keep throwing more batteries in a car, but can you do

I don't think you have any basis to say it is "quite easy" based off that article. You obviously can just keep throwing more batteries in a car, but can you do it at a reasonable cost while also making it safe and keeping the heat in check to maximize charging speed and the life of the battery like Tesla does?