While solar panels or windmills offer good options for future energy requirements, they have some drawbacks in the sense that they do not provide a stable and continuous supply of power whether at homes, offices or factories.  The solar or wind energy must be stored in a battery device that will keep everything operative or alighted on a continuous basis for a long period of time. The battery must be stable and powerful as well as it should occupy small space to meet an uninterrupted demand for energy.

The Dalian Institute of Chemical Physics in Liaoning Province, China has reportedly developed a lead-carbon battery for storing renewable energy. Under the leadership of Professor Li Xianfeng and Professor Zhang Huamin of the institute, the research team has developed a battery system that is capable of providing a stable voltage. With cent-percent recharge rate, the battery is safe in performance. To protect their intellectual property, the institute has applied for 10 national patents for this device.

The advantage with this battery system is that a fully-charged battery can keep a streetlight operative for over 23 hours at a stretch. Using this battery system, forty-six streetlights are already in operations harnessing solar energy through a solar panel. The institute wants to make more installations of similar kinds to test the battery system in different operating conditions.