Because that way the manufacturer risks the performance and safety of the batteries. Everything turns on the battery management system that continuously analyses all operating conditions and process parameters.
Bulging of age
Even bulging as a result of age can be identified in this way. And: The exact monitoring will reveal very quickly, which lithium batteries really deliver what their manufacturers promised. Because malfunctions are usually preceded by a gradual loss of performance and capacity. Further, these batteries tend to fall short of the promised number of charge cycles. (HS)
Look at this, too:
Storage advice: Lithium storage is a closed box
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