Are those solar panels on the top?
I was going to say it seems a bit heavy, but doing a quick metric conversion it's competitive with a Quest. The Mango does come in a pared-down 27kg (60lb) version, though.
Yes, they charge the 12v battery for the lights and indicators.
I think Rob said this one is the 2nd prototype and the new one is lighter.
Had it out for a short 30km ride around the lake and local cycle paths today.
It's bloody warm with the roof on so most of the ride was with it off, when going slow I was asked if I minded having my pic taken.
Queue of kids standing next to it while their dads took pic's.
Then more taken and Q's asked while I was in traffic later.
It's definitely a head turner