What is the Memory Effect of a Ni-Cd battery? How can I avoid it?
After using the battery, it needs to be discharged using a charger. If the battery has not been entirely emptied, the charge will not be complete and will set a new lower energy capacity. This is called the "memory effect".
To avoid this, it is best always discharge the batteries entirely. It will help lengthen their life.
The memory effect does not occur with Nickel-Metal Hydride and Lithium Ion batteries.