A hand-held capper/decapper device comprising: a housing configured to be held by hand against an array of threaded receptacles; an array of cap drivers supported by the housing and configured to engage and retain threaded caps; and motorized rotary drive that drives the cap drivers in forward and reverse rotary directions to cap and decap the caps on and from the threaded receptacles; characterized by: an array of ejector pins supported by the housing, the ejector pins extending through the cap drivers; motorized linear drive that drives the ejector pins through the cap drivers to eject caps from the cap drivers; and a motor controller that controls the motorized rotary drive and the motorized linear drive in response to a control button on the housing, the controller configured to control and alternate between a decap function and a cap function with each press of the control button, in the decap function, the motorized rotary drive driving the cap drivers in a reverse rotary direction to decap the threaded receptacles; and in the cap function, the motorized rotary drive driving the cap drivers in a forward rotary direction to cap the threaded receptacles, followed by the motorized linear drive driving the ejector pins through the cap drivers to eject the caps from the cap driver and then retracting the ejector pins. a housing configured to be held by hand against an array of threaded receptacles; an array of cap drivers supported by the housing and configured to engage and retain threaded caps; and motorized rotary drive that drives the cap drivers in forward and reverse rotary directions to cap and decap the caps on and from the threaded receptacles; characterized by: an array of ejector pins supported by the housing, the ejector pins extending through the cap drivers; motorized linear drive that drives the ejector pins through the cap drivers to eject caps from the cap drivers; and a motor controller that controls the motorized rotary drive and the motorized linear drive in response to a control button on the housing, the controller configured to control and alternate between a decap function and a cap function with each press of the control button, in the decap function, the motorized rotary drive driving the cap drivers in a reverse rotary direction to decap the threaded receptacles; and in the cap function, the motorized rotary drive driving the cap drivers in a forward rotary direction to cap the threaded receptacles, followed by the motorized linear drive driving the ejector pins through the cap drivers to eject the caps from the cap driver and then retracting the ejector pins. an array of ejector pins supported by the housing, the ejector pins extending through the cap drivers; motorized linear drive that drives the ejector pins through the cap drivers to eject caps from the cap drivers; and a motor controller that controls the motorized rotary drive and the motorized linear drive in response to a control button on the housing, the controller configured to control and alternate between a decap function and a cap function with each press of the control button, in the decap function, the motorized rotary drive driving the cap drivers in a reverse rotary direction to decap the threaded receptacles; and in the cap function, the motorized rotary drive driving the cap drivers in a forward rotary direction to cap the threaded receptacles, followed by the motorized linear drive driving the ejector pins through the cap drivers to eject the caps from the cap driver and then retracting the ejector pins.