A method for starting a brushless direct current motor of a motorized surgical tool, wherein the motorized surgical tool having a power unit, the power unit comprising: an outer enclosure defining an interior cavity; and at least one battery cell fully disposed within said interior cavity, wherein the power unit further comprises a printed circuit board disposed within said interior cavity, wherein the method comprising the steps of: first providing a motorized surgical tool comprising a brushless direct current motor having a rotor configured to rotate in at least one direction and a having stator comprising a plurality of phases, wherein, for any given position of the rotor, at least two combinations of the plurality of phases are positioned to, when powered, induce the rotor to rotate; after that applying a voltage to at least a first phase combination of a plurality of phases and a second phase combination of the plurality of phases, wherein both of the first phase combination and the second phase combination induce the rotor to rotate in the first direction when powered; after that comparing a first current drawn by the first phase combination and a second current drawn by the second phase combination; and after that applying a voltage to at least a third phase combination of the plurality of phases and the second phase combination of the plurality of phases upon determining that the current drawn by the second phase combination is less than the current drawn by the first phase combination. an outer enclosure defining an interior cavity; and at least one battery cell fully disposed within said interior cavity, wherein the power unit further comprises a printed circuit board disposed within said interior cavity, wherein the method comprising the steps of: first providing a motorized surgical tool comprising a brushless direct current motor having a rotor configured to rotate in at least one direction and a having stator comprising a plurality of phases, wherein, for any given position of the rotor, at least two combinations of the plurality of phases are positioned to, when powered, induce the rotor to rotate; after that applying a voltage to at least a first phase combination of a plurality of phases and a second phase combination of the plurality of phases, wherein both of the first phase combination and the second phase combination induce the rotor to rotate in the first direction when powered; after that comparing a first current drawn by the first phase combination and a second current drawn by the second phase combination; and after that applying a voltage to at least a third phase combination of the plurality of phases and the second phase combination of the plurality of phases upon determining that the current drawn by the second phase combination is less than the current drawn by the first phase combination. first providing a motorized surgical tool comprising a brushless direct current motor having a rotor configured to rotate in at least one direction and a having stator comprising a plurality of phases, wherein, for any given position of the rotor, at least two combinations of the plurality of phases are positioned to, when powered, induce the rotor to rotate; after that applying a voltage to at least a first phase combination of a plurality of phases and a second phase combination of the plurality of phases, wherein both of the first phase combination and the second phase combination induce the rotor to rotate in the first direction when powered; after that comparing a first current drawn by the first phase combination and a second current drawn by the second phase combination; and after that applying a voltage to at least a third phase combination of the plurality of phases and the second phase combination of the plurality of phases upon determining that the current drawn by the second phase combination is less than the current drawn by the first phase combination.