An oral care device comprising: a handle portion; an oral care implement coupled to the handle portion, the oral care implement comprising a brush head portion including brush filaments; a first electrode located in the brush head portion and operable to be in electrical contact with an oral cavity of the user; a second electrode located in the handle portion and operable to be in electrical contact with a hand of a user; a power source providing a voltage potential between the first electrode and the second electrode; a controller circuit electrically coupled to the first electrode, the second electrode, and the power source, wherein: electrical contact of the second electrode at the hand of the user and electrical-contact of the first electrode at the oral cavity of the user completes an electrical circuit between the first electrode and the second electrode; the first electrode is configured to be electrically decoupled from the controller circuit and the power source after a predetermined operational duration of the oral care device; the controller circuit detects a completion or an opening of the electrical circuit by measuring an impedance through the user between the hand of the user and the oral cavity of the user, such that a measured impedance above a threshold indicates the opening of the electrical circuit and a measured impedance below the threshold indicates the completion of the electrical circuit; upon detection of the completion of the electrical circuit, the controller circuit controls the oral care device to operate at a first operational mode; and upon detection of the opening of the electrical circuit, the controller circuit controls the oral care device to operate at a second operational mode; and further wherein the oral care device is configured to automatically detect which region of the oral cavity the user is brushing, and automatically switch its selected operational mode accordingly depending on the measured impedance compared against stored resistance or impedance ranges, wherein the selected operational mode is one of a plurality of operational modes. a handle portion; an oral care implement coupled to the handle portion, the oral care implement comprising a brush head portion including brush filaments; a first electrode located in the brush head portion and operable to be in electrical contact with an oral cavity of the user; a second electrode located in the handle portion and operable to be in electrical contact with a hand of a user; a power source providing a voltage potential between the first electrode and the second electrode; a controller circuit electrically coupled to the first electrode, the second electrode, and the power source, wherein: electrical contact of the second electrode at the hand of the user and electrical-contact of the first electrode at the oral cavity of the user completes an electrical circuit between the first electrode and the second electrode; the first electrode is configured to be electrically decoupled from the controller circuit and the power source after a predetermined operational duration of the oral care device; the controller circuit detects a completion or an opening of the electrical circuit by measuring an impedance through the user between the hand of the user and the oral cavity of the user, such that a measured impedance above a threshold indicates the opening of the electrical circuit and a measured impedance below the threshold indicates the completion of the electrical circuit; upon detection of the completion of the electrical circuit, the controller circuit controls the oral care device to operate at a first operational mode; and upon detection of the opening of the electrical circuit, the controller circuit controls the oral care device to operate at a second operational mode; and further wherein the oral care device is configured to automatically detect which region of the oral cavity the user is brushing, and automatically switch its selected operational mode accordingly depending on the measured impedance compared against stored resistance or impedance ranges, wherein the selected operational mode is one of a plurality of operational modes. electrical contact of the second electrode at the hand of the user and electrical-contact of the first electrode at the oral cavity of the user completes an electrical circuit between the first electrode and the second electrode; the first electrode is configured to be electrically decoupled from the controller circuit and the power source after a predetermined operational duration of the oral care device; the controller circuit detects a completion or an opening of the electrical circuit by measuring an impedance through the user between the hand of the user and the oral cavity of the user, such that a measured impedance above a threshold indicates the opening of the electrical circuit and a measured impedance below the threshold indicates the completion of the electrical circuit; upon detection of the completion of the electrical circuit, the controller circuit controls the oral care device to operate at a first operational mode; and upon detection of the opening of the electrical circuit, the controller circuit controls the oral care device to operate at a second operational mode; and further wherein the oral care device is configured to automatically detect which region of the oral cavity the user is brushing, and automatically switch its selected operational mode accordingly depending on the measured impedance compared against stored resistance or impedance ranges, wherein the selected operational mode is one of a plurality of operational modes.