There is no doubt that lead-acid batteries are used as power batteries and have their advantages in design. The advantage is that the open circuit power supply provided by it is relatively large (compared to lithium batteries). A 12V battery only needs to be made into one battery. However, lithium batteries may need to be connected in series to form a battery pack when used as a power battery. For power battery design, lead-acid batteries can be easily implemented, while lithium batteries need to be designed, post-charged, and used for maintenance. Encountered a lot of problems. From the perspective of manufacturing costs, the current power battery, the former is to be reached, the latter is high. But the latter is the future development trend.