Thank you for this info. You are right, Brompton M3 will be 36.3 pounds when electric components weighting 10.8 pounds are added. For me, a Brompton is very cute and elegant. Anyway I am also inclined now for a Birdy; its lightest monocoque model weights only 23.4 pounds however if I add a Bionx 350 weigting 17.6 pounds (with Li battery), total weight for Birdy+Bionx is 41 pounds

I will either keep it a non electric and buy a Birdy, Brompton or Tikit.