Note to players: Description acceptable. One technology for this purpose has an “advanced adiabatic” variant that has yet to achieve viability. Various devices that serve this purpose can be compared using a Ragone plot. (15[2]-5[1])One type of device used (-5[1])for this purpose (15[1])relies on the formation of a double layer on two coatings of activated (-5[1])carbon and is called an EDLC. (15[1]-5[1])Another system for this purpose uses magnetic bearings to levitate a (*) flywheel. Round-trip efficiencies between 70-80% are achieved by “pumped” systems for this purpose, (10[1]-5[2])which hold water (-5[1])at two different elevations to deal (10[1])with load (10[1])fluctuations. (10[2])Technologies for this purpose (10[1])are needed because, for (10[1])many renewables, (10[1])peak demand (10[2])and (-5[1])peak production (10[1])occur at different (10[1])times. (10[2])For (10[1])10 points, name this process performed by hooking up a power plant to a grid of rechargeable batteries. ■END■ (10[7])