Batteries and Storing Energy
The battery is an important component of many industries. The starter battery was developed because a mass automotive industry continued to evolve and expand, creating the demand and economies of scale at a point where research was feasible. Similarly, the automotive, datacenters and power distribution companies, etc., created the demand that allowed research into deep-cycle batteries and the handheld consumer device market has helped advance the Lithium-ion battery to its current state of efficiency.
Robotics is yet another industry in which the battery is a major component. It will be interesting to see if this industry adopts the Lithium-ion battery that has a specific energy of 175 Wh/Kg or the Aluminum air battery that has a specific energy of 1300 Wh/Kg -- Aluminum is around 7 times better!
Or maybe, Flywheel batteries could be used. These have a specific energy of 120 Wh/Kg. I am assuming that it is easier to discharge/drain a mechanical battery from a distance than, it is to discharge a chemical battery -- a feature that is extremely useful in a revolutionary i,Robot type revolt.