All This Battery-Hype Should Make Tesla Investors Nervous All This Battery Hype Should Make Tesla Investors Nervous Christopher Helman Forbes Staff 5/12/2015 http://www.forbes.com/sites/christopherhelman/2015/05/12/all-this-battery-hype-should-make-tesla-investors-nervous/ Elon Musk is a genius marketer. The hype and buzz that he and Tesla have created around their new Powerwall battery system is remarkable.