A Japanese researcher has created the world's first 'car in a bag':

A Japanese engineer has developed a portable transporter small enough to be carried in a backpack that he says is the world's first 'car in a bag'.

Twenty-six-year-old Kuniako Saito and his team at Cocoa Motors recently unveiled the lithium battery-powered "WalkCar" transporter, which is the size of a laptop and resembles a skateboard more than a car.

The slender WalkCar is made from aluminum and weighs between two and three kilograms (4.4 to 6.6 pounds), depending on whether it is an indoor or outdoor version.

Saito expects to see many other uses for his transporter, as he says it has enough power to help people push wheelchairs with ease. The lightweight aluminum board is stronger than it looks, and can take loads of up to 120kg (265 pounds).

It reaches top speeds of 10 kilometers per hour (6.2 miles per hour), for distances of up to 12 kilometers (7.4 miles) after three hours of charging.

Its developer says it's also extremely simple to ride. Once the rider stands on it the WalkCar starts automatically, while simply stepping off stops the vehicle. To change direction, the user just shifts their weight.