In the battery pack, the difference between the monomers always exists. Taking the capacity as an example, the difference never disappears.
But gradually deteriorated. The same current flows through the group. Relatively speaking, the larger the capacity is always in the shallow current of shallow current, the slower the capacity decay, the longer the life, and the smaller the capacity is always overcharged. Release, tend to increase capacity attenuation, shorten life,
The difference in performance parameters between the two is getting larger and larger, forming positive feedback characteristics, small capacity premature failure, and group life is shortened.