The battery powers the pump, which injects the cleaning fluid into the vaporizer at a rate around 3ml per second. The LPG powers the heating unit built into this lightweight machine. This combination of natural chemical, steam and slight agitation with either brass or nylon brush completely removes the gum and stain in 5-7 seconds. In one hour you are able to remove 650-700 pieces of gum with an extremely easy to operate piece of portable equipment. 1 Year Warranty.