In February 2019, the company acquired German solar battery company Sonnen. It was inferred that solar battery power was low due to its small body. "Suntory Mermaid II" was powered by single solar battery and made from recycled materials. In 1954, RCA intro Bell Telephone Labs produced the first Solar battery. In a slightly updated version of the film, the "solar battery" is discussed. For instance, portable solar battery maintainers generally connect to a vehicle's battery in this manner.