Liquid cartridge

A liquid cartridge comprising:

• a liquid chamber having an air communication opening configured to provide communication between an interior of the liquid chamber and an atmosphere of an exterior of the liquid chamber to equalize a pressure of the interior of the liquid chamber with a pressure of the exterior of the liquid chamber,
• a liquid supply portion selectively providing liquid communication from an interior of the liquid chamber to an exterior of the liquid chamber, the liquid supply portion and the air communication opening being disposed at a same side of the liquid chamber;
• a partitioning wall partitioning the liquid chamber into a first liquid chamber and a second liquid chamber,
• a communication opening selectively providing fluid communication between the first liquid chamber and the second liquid chamber;
• and
• a movable member which is movable between a block position and a communication position, wherein when the movable member is in the block position, the movable member blocks the communication opening, and when the movable member is in the communication position, the communication opening is opened to provide fluid communication between the first liquid chamber and the second liquid chamber, and wherein the movable member is configured to move from the block position to the communication position in response to the cartridge being received by a cartridge mounting portion.