A surgical system comprising: a battery pack, wherein the battery pack comprises: a plurality of cells; a casing defining an interior cavity having at least one interior cavity wall, wherein the at least one interior cavity wall comprises a first electrode electrically connected to an anode of the battery pack and a second electrode electrically connected to a cathode of the battery pack; a battery drain positioned within the interior cavity, wherein the battery drain comprises first and second contacts electrically connected to one another, wherein the first and second contacts are in contact with the at least one interior cavity wall, and wherein the battery drain is positionable at a first position within the interior cavity where the first and second contacts are not in electrical contact with the first and second electrodes and a second position where the first contact is in electrical contact with the first electrode and the second contact is in electrical contact with the second electrode; and a switch having an open position and a closed position, wherein when the switch is in its open position at least a portion of the plurality of cells are not electrically connected to one another, and wherein when the switch is in its closed position the plurality of cells are electrically connected to one another. a battery pack, wherein the battery pack comprises: a plurality of cells; a casing defining an interior cavity having at least one interior cavity wall, wherein the at least one interior cavity wall comprises a first electrode electrically connected to an anode of the battery pack and a second electrode electrically connected to a cathode of the battery pack; a battery drain positioned within the interior cavity, wherein the battery drain comprises first and second contacts electrically connected to one another, wherein the first and second contacts are in contact with the at least one interior cavity wall, and wherein the battery drain is positionable at a first position within the interior cavity where the first and second contacts are not in electrical contact with the first and second electrodes and a second position where the first contact is in electrical contact with the first electrode and the second contact is in electrical contact with the second electrode; and a plurality of cells; a casing defining an interior cavity having at least one interior cavity wall, wherein the at least one interior cavity wall comprises a first electrode electrically connected to an anode of the battery pack and a second electrode electrically connected to a cathode of the battery pack; a battery drain positioned within the interior cavity, wherein the battery drain comprises first and second contacts electrically connected to one another, wherein the first and second contacts are in contact with the at least one interior cavity wall, and wherein the battery drain is positionable at a first position within the interior cavity where the first and second contacts are not in electrical contact with the first and second electrodes and a second position where the first contact is in electrical contact with the first electrode and the second contact is in electrical contact with the second electrode; and a switch having an open position and a closed position, wherein when the switch is in its open position at least a portion of the plurality of cells are not electrically connected to one another, and wherein when the switch is in its closed position the plurality of cells are electrically connected to one another.