What a gravity battery looks like

People have been tapping the force of gravity for centuries to get work done. The area where I live had a number of water mills in the medieval era, all running off the power of falling water. Hydropower uses the same logic, generating electricity from water running downhill.

There’s an important role for gravity power in the clean energy transition too. As we all know, wind and solar are intermittent, and so we need energy storage to see us through periods of low production. There are mult...