Not great reader reviews on Amazon, and I agree with their points. I was thinking, "No one has heard of solar cell phone chargers?". And some of the tech seems sketchy, especially that wonderful perpetual motion generator.
"But continue, have you other reasons?"
"I have, but I have already been rebuked by your Grace with a reference to the breeding of horses, and do not feel at leave to proceed."
"Oh," said Gloriana. "Oh."