Lead acid battery is better, or lithium battery is better - this is a question that everyone will consider when buying electric vehicles.

From the safety point of view, lead-acid batteries do not have organic electrolyte, and generally do not have accidents such as fire and explosion; while lithium batteries have certain sealed space and contain organic matter, which may cause fire and explosion in the case of misuse.

Therefore, in terms of safety, lead-acid battery is better than lithium battery.

In terms of energy density, a kilogram of lithium battery contains 3-4 times as much energy as a kilogram of lead-acid battery. That is to say, lithium batteries can run further than lead-acid batteries with the same weight.

Therefore, in terms of energy density, lithium battery is better than lead-acid battery.

In terms of service life, a group of high-quality lithium batteries can be cycled about 1000 times, while lead-acid batteries are only about one third of lithium batteries.

Therefore, in terms of service life, lithium battery is better than lead-acid battery.

In addition, according to different materials, lithium batteries can also be divided into lithium iron phosphate battery, lithium ternary battery and lithium manganate battery. The characteristics of lithium batteries are different with different materials

Safety: lithium iron phosphate > Lithium Manganate > Lithium ternary;

Life: LiFePO4 > Li3 + > LiMn2O4;

Capacity: lithium ternary > lithium iron phosphate > Lithium Manganate;

Price: lithium iron phosphate > Lithium ternary > Lithium Manganate.

Therefore, both lead-acid batteries and lithium batteries, or different materials of lithium batteries, they have their own advantages and disadvantages, we can not simply use "good" or "bad" to define.