The present disclosure provides a developing cartridge. The developing cartridge includes a developing roller; a developing frame, where the developing frame includes a cartridge body, a driving-end cover and a conductive-end cover, the driving-end cover is at an end of the cartridge body along a length direction of the cartridge body, and the conductive-end cover is at another end of the cartridge body along the length direction of the cartridge body; a separation contact part; a tension spring; a force-receiving part, where the force-receiving part is configured to receive and transmit a driving force to rotate the developing roller; and an electrode assembly, where the electrode assembly is at an inner side of the conductive-end cover and electrically connected to an end of the developing roller; and an opening is formed on the conductive-end cover, and a portion of the electrode assembly is exposed through the opening.

Printers are disclosed herein. An example printer includes a housing; a non-refillable toner container permanently affixed within the housing, the toner container having a capacity sufficient to store enough toner to print a first number of pages that corresponds to an expected useful life of the printer; and a processor responsive to an input to enable a second number of pages to be printed by the printer, the second number of pages being less than the first number of pages.