Dissemination of IT for the Promotion of Materials Science (DoITPoMS)


Nickel-cadmium batteries

The exception to this is the nickel-cadmium battery, as subjecting them to partial discharge introduces “memory effects;” the battery appears to “remember” how much charge is being used, and will only recharge that amount rather than the full amount of charge.

In fact the repeated shallow charging causes the crystalline structure in the battery to change: the crystals in the cell grow larger, increasing the impedance and thus reducing its capacity.