Does the electric brake use battery power?
No battery power is used to keep the generator from turning when the switch is in the off position. What happens is that when the blades start to turn, all of the power they produce goes into stopping them from turning. So, you’ll notice that they will turn a little (slowly enough that you could reach up and grab one to stop them). If you want to ensure that they’re stopped, just tether a blade to your mounting tower.