An electrostatic sprayer includes a spray gun having a nozzle at which pressurized spray media and pressurized air are combined into an atomized mixture. A generator electrostatically charges the atomized mixture at the nozzle. The generator may also electrostatically charge the pressurized spray media, or the pressurized air, or both at the nozzle. An input device of the spray gun is actuable by a user to vary a flow of the pressurized spray media to the nozzle. A main unit is connected to the spray gun with a hose via which the pressurized spray media and the pressurized air are communicated to the spray gun. The main unit has a first power mode in which a battery powers component(s) of the electrostatic sprayer. The main unit also has a second power mode in which a power source spaced apart from the main unit powers the component(s) of the electrostatic sprayer.