According to examples, a toner refill apparatus may include a chamber to house a toner, in which the chamber may include an insertion section, the insertion section to be inserted into a refill port of a toner cartridge and including a discharge opening, the refill port including an electrical circuit component. The apparatus may also include a valve mechanism positioned at the discharge opening to control output of the toner from the chamber through the discharge opening, in which an actuator may engage the valve mechanism and may controllably open the valve mechanism. The apparatus may further include an electronic chip to be in electrical communication the electrical circuit component, in which a controller may activate the actuator based on a detection that the electronic chip is in contact with the electrical circuit component.