Flywheel batteries are electro-mechanical devices that convert electrical energy into the energy of motion (the spinning flywheel), thus storing it for later use.
(Flywheel batteries; are; electro-mechanical devices that convert electrical energy into the energy of motion (the spinning flywheel),) (electro-mechanical devices; convert; electrical energy; into the energy of motion)
Flywheel batteries electro-mechanical devices
are convert
electro-mechanical devices that convert electrical energy into the energy of motion (the spinning flywheel),
electrical energy into the energy of motion