Yes. After charging is completed a '25-50mA' trickle charge will be applied for an amount of time depending on the size of the battery. Although the battery will be classified as "FULL" and is ready to be used, the trickle charge will "top off" the battery for extra capacity.
For AAA size batteries, the trickle charge is '25mA' and will last for 2.5 hours after charging.
For AA size batteries, the trickle charge is '50mA' and will last for 2.5 hours after charging.
For C size batteries, the trickle charge is '50mA' and will last for 4 hours after charging.
For D size batteries, the trickle charge is '50mA' and will last for 7.5 hours after charging.
For 9V batteries there is no trickle charge. After 10 hours the regular charging current will be terminated automatically.