The improvement of a mobile fire extinguisher is described. The improved fire extinguisher can be inspected and maintained frequently and simply without any customized equipment. The improvement includes an anti connection device that can be connected from the outside of the camera to deform it,Stir or stir the dust in the camera to keep it liquefied. Additional improvements include a larger opening for faster filling and inspection of indoor dust. Another improvement includes the use of a carbon dioxide cartridge placed outside the camera to make it easier to provide service or replace a carbon dioxide cartridge, and the ability to keep the camera under no pressure so that it will not be transported through hasmat. These features extend the service interval and leave the fire extinguisher in a state of readiness.
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