The memory effect is an effect of the battery causing crystallization of the battery contents due to use. Generally only occurs in nickel-cadmium batteries, nickel-hydrogen batteries are less, lithium batteries do not have this phenomenon. The reason for this is due to incomplete partial charging and discharging of the battery. This will reduce the temporary capacity of the battery, resulting in the shorter use times.
The battery seems to memorize the user's daily charging and discharging amplitude and mode. It is difficult to change this mode for a long time, and it is impossible to charge or discharge it greatly. Lithium-ion batteries do not have this effect.
The battery memory effect refers to the reversible failure of the battery, that is, the performance that can be restored after the battery fails. This particular tendency is automatically maintained after the battery has been subjected to a specific duty cycle for a long time. This was first defined in nickel-cadmium batteries, nickel-cadmium bag batteries have no memory effect, and sintered batteries have a memory effect.