Abstract: A process cartridge includes: a drum cartridge; and a developing cartridge. The drum cartridge includes: a drum frame; a photosensitive drum rotatable about a first axis extending in a first direction; and a first memory having a first electrical contact surface. The developing cartridge is attachable to the drum frame and includes: a casing; a developing roller rotatable about a second axis extending in the first direction; a second memory having a second electrical contact surface; and a developing holder holding the second electrical contact surface such that the second electrical contact surface is movable relative to the casing. The drum cartridge further includes an elastic member that can expand and contract in a second direction crossing the first direction. The developing holder is connected to the elastic member and is movable in the second direction in a state where the developing cartridge is attached to the drum frame.

Abstract: A process cartridge includes: a drum cartridge; a developing cartridge; and a plate. The drum cartridge includes: a drum frame; a photosensitive drum; a first holder; and a first memory having a first electrical contact surface that is movably supported by the first holder. The developing cartridge is attachable to the drum frame. The developing cartridge includes: a casing; a developing roller; a second holder; and a second memory having a second electrical contact surface that is movably supported by the second holder. The plate connects the first holder and the second holder to each other in a state where the developing cartridge is attached to the drum frame. The second holder moves together with the plate in accordance with movement of the first holder in a state where the plate connects the first holder and the second holder to each other.

Abstract: An object of the present invention is to provide a stable thermoelectric battery. The object can be solved by a thermoelectric battery comprising a working electrode containing a n-type silicon and germanium, a counter electrode, and a solid electrolyte having a polymer having a specific repeating unit with a molecular weight of 200 to 1,000,000, or a derivative thereof, wherein the solid electrolyte contains copper ions or iron ions as an ion source.

Abstract: An object of the present invention is to provide a stable thermoelectric battery. The object can be solved by a thermoelectric battery comprising a working electrode containing a n-type silicon and germanium, a counter electrode, and a solid electrolyte having a polymer having a specific repeating unit with a molecular weight of 200 to 1,000,000, or a derivative thereof, wherein the solid electrolyte contains copper ions or iron ions as an ion source.