1H 1M -3H
3H 1M +
1 hour and about 410,000 revs
Just over an hour for me.
Probably about 4 hours for me but that was really tiring. Ive kept the ball spinning for 9 hours non stop, slow speed though. Even had my lunch and dinner with my powerball in my hand lol.
When I first got it, I practiced 3 hours a day!