Why is it necessary to discharge Ni-Cd cells before the process of charging?
You should discharge Ni-Cd cells before every fifth to tenth process of charging in order to avoid the feared memory effect. The memory effect has the consequence that the not used parts of the cell due to partially discharging are no longer in a position to receive and produce energy. Consequently, the operating times of their users (appliances) become shorter and shorter and the cells have to be recharged more frequently.
