A fluid sprayer includes a housing defining a reservoir attachment portion, a pump supported within the housing, a nozzle assembly supported by the housing and located in fluid communication with the pump, and an electrostatic charging circuit configured to impart an electrostatic charge in a fluid pumped out of the nozzle assembly by the pump. The fluid sprayer also includes a first reservoir including a first latch configured to releasably secure the first reservoir to the reservoir attachment portion to fluidly couple the first reservoir to the pump. The fluid sprayer further includes a second reservoir including a tank, an adapter, and a hose fluidly connecting the tank to the adapter, the adapter including a second latch configured to releasably secure the adapter to the reservoir attachment portion to fluidly couple the tank to the pump.