"Cam, they are talking about powering cities up - there must be batteries,"
Chuckles, you've got to think outside the battery box. Batteries are for little folks. When you want to store massive amounts of power, there are better ways to do it. Years ago when Indian Point (nuke) was in discussion, there was also a lot of discussion about hollowing out Storm King (?) mountain and installing giant
pumps. At night when there was excess power, they would
pump megagallons of water UP into the mountain. During the day, they would let it run out and reverse the
pumps as dynamos. Storing the electricity as kinetic energy, no batteries needed.
Never happened though, I think there was a ruckus about how the fish might mind it.