Abstract: An automated chemical fluid applicator apparatus includes a container of fluid chemical having an integrated pressurization device and an outlet for releasing the fluid chemical. A portable, battery-powered fluid pumping apparatus is retrofitable to the container and has housing having at least one fluid inlet port and at least one fluid outlet port, wherein the at least one fluid inlet port is connectable to the outlet of the container. A liquid diaphragm pump is positioned within the housing. A battery is removably connectable to a battery terminal connector formed on the housing, wherein the battery powers the liquid diaphragm pump. A control switch is positioned on the housing and controls activation of the liquid diaphragm pump to expel the quantity of fluid chemical from the at least one fluid outlet port.