Green battery is developing rapidly with the rise of people's environmental protection awareness. 

This concept can be construed as follows: 

1. A green battery does not contain any harmful substances such as mercury, cadmium and lead.

2. The production process of the green battery meets the requirements for clean production. To be specific, pollutant discharge accords with the standard, and quality of the products is conforming to or above the applicable standard, and the waste battery does not pollute the environment.