What's mean
battery Shorted Cells?
Manufacturers are often unable to explain why some cells develop high electrical leakage or an electrical short while the batteries are still relatively new. There are a number of possible reasons that contribute to this irreversible form of cell failure. The suspected culprit is foreign particles that contaminate the cells during manufacture. Another possible cause is rough spots on the plates that damage the separator. Better quality control at the raw material level and minimal human interface during the manufacturing process has greatly reduced the 'infant mortality' rate of the modern rechargeable
cells. Cell reversal caused by deep discharging also contributes to shorted cells. This commonly occurs if a nickel-based battery is being fully depleted under a heavy load. A NiCd
battery is designed with some reverse voltage protection and a small reverse current in the magnitude of milliamperes can be tolerated. A high current, however, causes the reversed-polarized cell to develop a permanent electrical short. Another cause of a short circuit is marring the separator through uncontrolled crystalline formation. more info:
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