Elon Musk

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Elon Musk may make batteries for a living, but the billionaire entrepreneur once required a shocking amount of caffeine to stay energized.

At one point, the Tesla and SpaceX CEO was reportedly consuming eight cans of Diet Coke and several large coffees in a day to keep himself alert and on top of his grueling work schedule, Inc. previously reported.

This was back when Musk was working 100 hours per week during the launch of his companies.

“I got so freaking jacked that I seriously started to feel like I was losing my peripheral vision,” Musk told Inc. He claims…