NOVELTY - A hydrogen electrolysis device (10) for use with vehicles, comprises: a canister (12) having a first end (14) and an opposing second end (16); a hydrogen electrolysis generator operatively retained within the canister; and apertures within the cup portion where liquid and gases flow between the inner cup volume into the canister volume of space in response to operation of the hydrogen electrolysis generator.    USE - The hydrogen electrolysis device is for use with vehicles (claimed).    ADVANTAGE - The hydrogen electrolysis device provides improved gas mileage, and provides improved function of the vehicle engine efficiency and cost effective.    DETAILED DESCRIPTION - A hydrogen electrolysis device for use with vehicles, comprises: a canister having a first end and an opposing second end; a hydrogen electrolysis generator operatively retained within the canister, the hydrogen electrolysis generator having a cup portion coupled to the second end of the canister, creating a inner cup volume between the cup portion and the second end of the canister and a canister volume between the cup portion and the first end of the canister, where the cup portion comprises conductive members extending from the inner cup volume into the canister volume; and apertures within the cup portion where liquid and gases flow between the inner cup volume into the canister volume of space in response to operation of the hydrogen electrolysis generator. INDEPENDENT CLAIMS are:    (1) a method of using a hydrogen electrolysis device with a vehicle, comprising: providing a hydrogen electrolysis device operating at the ambient atmospheric pressure; coupling the electrolysis device to vehicle, where the electrolysis device is coupled to the vehicle power source and fluidly coupled to the air intake of the vehicle engine; producing oxygen and hydrogen gases from the electrolysis device; and delivering the oxygen and hydrogen gases to the air intake of the vehicle engine; and    (2) a vehicle with a hydrogen electrolysis device, the device comprising: a vehicle with an internal combustion engine; and a hydrogen electrolysis device comprising: a canister having a first end and an opposing second end; a hydrogen electrolysis generator operatively retained within the canister, the hydrogen electrolysis generator having a cup portion coupled to the second end of the canister, creating a inner cup volume between the cup portion and the second end of the canister and a canister volume between the cup portion and the first end of the canister, where the cup portion comprises conductive members extending from the inner cup volume into the canister volume; and apertures within the cup portion where liquid and gases flow between the inner cup volume into the canister volume of space in response to operation of the hydrogen electrolysis generator.    DESCRIPTION OF DRAWING(S) - The drawing shows a perspective view of a hydrogen electrolysis device.    Hydrogen electrolysis device (10)    Canister (12)    First end (14)    Second end (16)    Gas outlet (18)    Water fill tube (20)    Wires (22)    Fill gauge (24)