An apparatus, comprising: a housing having a cavity (105, 505, 705); an insertion member moveable within the cavity (105, 505, 705); a connector (106, 506, 706) positioned within the cavity (105, 505, 705); and a switch (900, 1108) positioned within the cavity, wherein movement of the insertion member causes the connector to connect or disconnect from the switch (900, 1108), characterized in that the switch (900, 1108) comprises: a first layer (902, 1140) of flexible polymer film and a second layer (904, 1148) of flexible polymer film that are separated by a gap; and a conductor and a resistive element coupled to one another and disposed within the gap, wherein a portion of the conductor overlaps the resistive element and extends between the resistive element and the first layer (902, 1140) of flexible polymer film and can be moved into and out of contact with the resistive element; wherein when the portion of the conductor that extends between the resistive element and the first layer of flexible polymer film is moved into contact with the resistive element a circuit path through the resistive element is shortened and the switch provides a lower resistance relative to when the portion of the conductor that extends between the resistive element and the first layer of flexible polymer film is not in contact with the resistive element. a housing having a cavity (105, 505, 705); an insertion member moveable within the cavity (105, 505, 705); a connector (106, 506, 706) positioned within the cavity (105, 505, 705); and a switch (900, 1108) positioned within the cavity, wherein movement of the insertion member causes the connector to connect or disconnect from the switch (900, 1108), characterized in that the switch (900, 1108) comprises: a first layer (902, 1140) of flexible polymer film and a second layer (904, 1148) of flexible polymer film that are separated by a gap; and a conductor and a resistive element coupled to one another and disposed within the gap, wherein a portion of the conductor overlaps the resistive element and extends between the resistive element and the first layer (902, 1140) of flexible polymer film and can be moved into and out of contact with the resistive element; wherein when the portion of the conductor that extends between the resistive element and the first layer of flexible polymer film is moved into contact with the resistive element a circuit path through the resistive element is shortened and the switch provides a lower resistance relative to when the portion of the conductor that extends between the resistive element and the first layer of flexible polymer film is not in contact with the resistive element. a first layer (902, 1140) of flexible polymer film and a second layer (904, 1148) of flexible polymer film that are separated by a gap; and a conductor and a resistive element coupled to one another and disposed within the gap, wherein a portion of the conductor overlaps the resistive element and extends between the resistive element and the first layer (902, 1140) of flexible polymer film and can be moved into and out of contact with the resistive element; wherein when the portion of the conductor that extends between the resistive element and the first layer of flexible polymer film is moved into contact with the resistive element a circuit path through the resistive element is shortened and the switch provides a lower resistance relative to when the portion of the conductor that extends between the resistive element and the first layer of flexible polymer film is not in contact with the resistive element.