memory effect

This article is about the 'memory' observed in batteries. For other uses, see Memory (disambiguation). Memory effect, also known as lazy battery effect, is an effect observed in some rechargeable batteries that causes them to hold less charge. In its original meaning it describes one very specific situation in which certain NiCd batteries gradually lose their maximum energy capacity if they are repeatedly recharged after being only partially discharged. Today, the term is commonly applied to almost any case in which a battery appears to hold less charge than was expected, or when a battery is charged when it still has half of its life left several times, the battery will only discharge half the expected amount of power.
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