ROMEO battery possible partner? "I think Romeo could potentially be a partner". She explained that Exro makes the controller for a stationary storage unit that goes on a facility to power up a building. Inside that unit "will be what's called a battery management system, it's controlling the battery cells itself and there's usually an invertor that sends the power. We've combined the invertor with the battery management system into one and we have a new type of battery management", they call it a controller and it'll be able to determine from a cell level a good battery from a bad battery. She stated that they have a large container designated for safely testing this technology.