Once built, you can use and reuse the materials that went to the battery almost indefinitely. The stuff inside the battery does not get consumed, it just change

Once built, you can use and reuse the materials that went to the battery almost indefinitely. The stuff inside the battery does not get consumed, it just changes form. And once you have used all the cycles, you can take the battery apart, leaving you with the stuff you began with, ready to be assembled into a new battery. So if you generate all your energy via solar, you only need sunlight to charge and recycle them all.