Ternary lithium battery and lithium iron phosphate battery have different characteristics, and the main contradiction focuses on “energy density” and “safety”. Ternary lithium batteries have higher energy density, but their safety is often questioned. Although the energy density of lithium iron phosphate battery is small, it is said to be safer. Such as we all know 18650 cells, The size is Diameter 18mmm and Height 65mm, but the max capacity of Ternary lithium battery can reach 3500mah, but the max.Capacity of LiFePO4 battery only can realize 2000mah in same volume.