Summary:

- The article discusses the development of a new water-based battery that can store electricity for long periods of time, making it a promising technology for renewable energy storage.
- The battery uses an electrolyte solution made from seawater and common table salt, which is inexpensive and environmentally friendly compared to traditional lithium-ion batteries.
- Researchers at the University of Tokyo have successfully demonstrated the battery's ability to store energy for several months without significant loss, indicating its potential for large-scale energy storage applications.