Batteries are dangerous goods. Because there are corrosive liquids in the battery, the battery is a dangerous goods. The battery will also have an impact on the environment, because the production of batteries is mainly caused by lead pollution. Due to the high cost of nickel-cadmium batteries, lead-acid batteries are generally used in my country's batteries, and lead-acid batteries are mainly lead and sulfuric acid. Recycling will inevitably cause lead pollution to the environment.

Batteries are an indispensable part of automobiles and can be divided into traditional lead-acid batteries and maintenance-free batteries. Since the battery uses lead-calcium alloy as the grid, the amount of water decomposition generated during charging is low, and the amount of water evaporation is also low. In addition, the shell adopts a sealed structure, and the released sulfuric acid gas is also very small, so it is compared with traditional batteries. , It has the advantages of no need to add any liquid, to the wire pile head, and long power storage time.