Engineering Question #2185

Joaquin Cornejo, a 30 year old male from Los Angeles asks on July 25, 2004,

Why do dry cell batteries (rechargeable) need to be fully drained before they can be recharged?

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The answer

Barry Shell answered on July 25, 2004

It has to do with complicated changes in the crystalline structure of cadmium materials inside the battery. It's really only a problem with NiCd batteries. The best explanation is given by Isidore Buchmann in Vancouver, Canada.

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