A 4.5kg fire extinguisher is a medium-to-large portable extinguisher designed to provide greater extinguishing capacity than smaller 1kg or 2kg units. In Australia, 4.5kg extinguishers are commonly available as ABE dry chemical powder extinguishers, which can provide protection against Class A fires involving ordinary combustibles, Class B fires involving flammable liquids, and fires involving energised electrical equipment when the extinguisher is appropriately rated. The im