For anyone wondering List of pumped-storage hydroelectric power stations https://en.wikipedia.org/wiki/List_of_pumped-storage_hydroelectric_power_stations http

For anyone wondering List of pumped-storage hydroelectric power stations https://en.wikipedia.org/wiki/List_of_pumped-storage_hydroelectric_power_stations https://en.wikipedia.org/wiki/List_of_pumped-storage_hydroel... List of (non-hydro) energy storage power plants https://en.wikipedia.org/wiki/List_of_energy_storage_power_plants https://en.wikipedia.org/wiki/List_of_energy_storage_power_p... Largest battery plants in particular: https://en.wikipedia.org/wiki/Battery_storage_power_station#Largest_grid_batteries https://en.wikipedia.org/wiki/Battery_storage_power_station#... "Really small capacity" here apparently means "roughly 4 hours of discharging as fast as possible".