The working principle of lead-acid batteries is relatively simple, mainly relying on the chemical reaction between lead and lead oxide (usually referred to as lead-acid) to store and release electrical energy. During charging, lead sulfate is oxidized to lead dioxide at the positive electrode and reduced to lead at the negative electrode; When discharging, this process proceeds in the opposite direction, releasing electrical energy.

Lead acid batteries are a type of energy storage equipment that has undergone long-term development and widespread application, known for their stability and reliability. Since its invention, lead-acid batteries have played an important role in many fields, such as automotive starting, uninterruptible power supply systems (UPS), electric tools, and renewable energy systems.