The only kind of battery capable of reliably doing what you describe is a sand battery, and there are currently only 2 in the world, and they are in Finland. h

The only kind of battery capable of reliably doing what you describe is a sand battery, and there are currently only 2 in the world, and they are in Finland. https://www.azom.com/article.aspx?ArticleID=21871 https://www.azom.com/article.aspx?ArticleID=21871 https://www.uniladtech.com/news/tech-news/world-largest-sand-battery-powers-entire-town-498137-20260327 https://www.uniladtech.com/news/tech-news/world-largest-sand...