One of my force-multipliers is the Inmotion V5F monowheel [1] This is among my favorite devices of all time. It is quick, nimble, and lightweight. It has compl

One of my force-multipliers is the Inmotion V5F monowheel [1] This is among my favorite devices of all time. It is quick, nimble, and lightweight. It has completely replaced walking, a car or a bicycle for my local trips. While there is a learning curve, unlike a bicycle, it has required almost [2] no maintenance in ~4000 miles of riding, and both hands are free to hold things so I can carry much more than I ever could on a bike. I've transported a desk, groceries, a 50 lb box of firewood, gardening tools, and so on. Plus, riding one is just plain FUN: it feels like skiing or flying. You really have to try it to know. A pessimistic estimate of the V5F monowheel's efficiency: * Battery = 320 Wh = 275335 calories * Weight = 12 kg for the device, so with a rider around 95kg * Range = 20 km on the low end (25-30 km is typical, manufacturer claims 38±3 km) Efficiency = 275335 calories / 95000g / 20km = 0.14 calories/g/km An optimistic estimate given my actual riding experience: Efficiency = 275335 calories / 91175g / 30km = 0.10 calories/g/km [1] https://www.myinmotion.com/products/solowheel-glide-2 https://www.myinmotion.com/products/solowheel-glide-2 [2] It still works just fine despite me beating the hell out of it, but the battery has worn down to ~70%