Lead acid batteries are a mature and reliable energy storage device. Despite facing some technical challenges, their excellent performance and wide range of application scenarios still make them occupy a place in the field of energy storage. Whether it's starting a car, serving as a backup power source for power supply, or for various other applications, lead-acid batteries can provide stable and reliable power support. In the future, with the continuous progress of technology, we have reason to believe that lead-acid batteries will be applied in more fields to better meet the energy needs of society.