18650 Battery pack are widely used, so it is necessary to pay attention to the safety requirements.
In the battery pack, the difference between the monomers always exists, and the capacity will never disappear as an example,
But the gradual deterioration of the group through the same current, relatively speaking, large capacity is always in the small current capacity, shallow charge and discharge light tends to slow decay, long service life, small capacity and it is always in high current charge off, tends to accelerate, shorten the life of capacity decay.
The difference of performance parameters between them is increasing, forming positive feedback characteristics, premature failure of small capacity shorten life of the 18650 Battery Pack.
