Memory effect, also known as battery effect, lazy battery effect, or battery memory, is an effect observed in nickel-cadmium rechargeable batteries that causes them to hold less charge.12 It describes the situation in which nickel-cadmium batteries gradually lose their maximum energy capacity if they are repeatedly recharged after being only partially discharged. The battery appears to "remember" the smaller capacity.3
This article is about the 'memory' observed in batteries. For the effect related to gravitational waves, see Gravitational memory effect. For other uses, see Memory (disambiguation).