What does 'memory effect' mean for an accumulator?

Question

Question EASA Drone Quiz - Flight performance and planning

QuizVDS · Accepted Answer

When the ground temperature is below the dew point

QuizVDS · Answer

Yes, always as they can quickly change performance and interrupt its normal flight attitude.

QuizVDS · Answer

Depends on the experience of the remote pilot

QuizVDS · Answer

Always on autumn mornings

Id 108 - EASA Drone Quiz – Drone Pilot Certification - What does 'memory effect' mean for an accumulator?