An electric power washer comprising: A. a main body comprising a pump and an electric power source (16, 16'), wherein the pump is operatively-connected to the electric power source (16, 16'); B. a hose comprising a first end and a second end opposite the first end, wherein the first end is fluidly-connected to the pump; C. a handle fluidly-connected to the second end, wherein the handle comprises a button; and D. a control circuit operatively-connected to the pump, and the control circuit operatively-connected to the electric power source (16, 16'), wherein the control circuit controls the output of the pump, and wherein the button is operatively-connected to the control circuit, wherein the control circuit permits the pump to normally operate at up to 100% normal power, wherein 100% normal power is defined as the highest sustainable power draw which will not permanently damage the electric power source, motor or the pump, characterized in that when the button is activated, the control circuit permits the pump to operate at a boost power mode of from about 103% normal power to about 300% normal power; or from about 105% normal power to about 250% normal power; or from about 110% normal power to about 200% normal power, and wherein the control circuit comprises a timer operatively-connected to the control circuit, the control circuit terminates the boost power mode after a predetermined period of time or when the button is no longer activated whichever is shorter; wherein the control circuit intermittently pulses between the boost power mode and the normal power for the predetermined period of time. A. a main body comprising a pump and an electric power source (16, 16'), wherein the pump is operatively-connected to the electric power source (16, 16'); B. a hose comprising a first end and a second end opposite the first end, wherein the first end is fluidly-connected to the pump; C. a handle fluidly-connected to the second end, wherein the handle comprises a button; and D. a control circuit operatively-connected to the pump, and the control circuit operatively-connected to the electric power source (16, 16'), wherein the control circuit controls the output of the pump, and wherein the button is operatively-connected to the control circuit, wherein the control circuit permits the pump to normally operate at up to 100% normal power, wherein 100% normal power is defined as the highest sustainable power draw which will not permanently damage the electric power source, motor or the pump, characterized in that when the button is activated, the control circuit permits the pump to operate at a boost power mode of from about 103% normal power to about 300% normal power; or from about 105% normal power to about 250% normal power; or from about 110% normal power to about 200% normal power, and wherein the control circuit comprises a timer operatively-connected to the control circuit, the control circuit terminates the boost power mode after a predetermined period of time or when the button is no longer activated whichever is shorter; wherein the control circuit intermittently pulses between the boost power mode and the normal power for the predetermined period of time.