Image forming apparatus having developing cartridge movable relative to photosensitive drum

An image forming apparatus comprising:

• a housing;
• a developing cartridge comprising:
• a developing roller rotatable about a first axis extending in a first direction;
• a memory configured to store information related to the developing cartridge;
• and
• a first electrical contact electrically connected to the memory;
• a drum cartridge to which the developing cartridge is attachable, the drum cartridge being configured to attach to the housing, and comprising:
• a photosensitive drum rotatable about a second axis extending in the first direction;
• a second electrical contact configured to contact with the first electrical contact;
• and
• a third electrical contact electrically connected to the second electrical contact, the third electrical contact being disposed at a position different from a position at which the second electrical contact is disposed;
• a lever configured to move the developing cartridge between a first position at which a surface of the developing roller and a surface of the photosensitive drum are in contact with each other and a second position at which the surface of the developing roller and the surface of the photosensitive drum are out of contact with each other, the second electrical contact being in contact with the first electrical contact in a state where the developing cartridge is at the second position, the second electrical contact being out of contact with the first electrical contact in a state where the developing cartridge is at the first position;
• and
• an electrical connector configured to contact with the third electrical contact.