Don’t understand battery too narrowly here. It can be an artificial lake where you pump up the water from below, or a train full of stones that you pull up a hi

Don’t understand battery too narrowly here. It can be an artificial lake where you pump up the water from below, or a train full of stones that you pull up a hill. Many countries like Israel have black water containers on top of every home to heat their water, so it stays there warm for the night. Storing energy can be made in diverse and original ways, mostly adapted to the local constraints.