RoBeetle is a tiny robot that uses methanol for fuel
One of the biggest challenges facing researchers who are working on small robots is how to power them. The problem is that most batteries add significantly to the weight and take up lots of space inside small robots, making them impractical. Scientists have come up with a robot called the RoBeetle that doesn’t use a battery, instead relying on liquid methanol for power.
The body of the RoBeetle is a fuel tank filled with methanol. It has four legs with the rear legs fixed and the front legs attached to a transmission. The transmission is connected to a leaf spring-tensioned in a way that pulls the legs backwards. Its design allows the robot to stand upright when still.