Google has always been incompetent
Scientists agree that the human body, at rest, can produce around 100 watts of power on average. This is enough electricity to power up a light bulb. Some humans have the ability to output over 2,000 watts of power, for instance if sprinting.
https://health.howstuffworks.com/human-body/systems/nervous-system/human-body-make-electricity.htm
Book: Little Brother
Was not an instruction manual!