A battery system comprising a battery module, wherein the battery module comprises: - a housing having a wall at least partially defining an interior of the housing, wherein the wall comprises an opening extending from an inner surface of the wall facing the interior of the housing to an outer surface of the wall opposite to the inner surface; - a connector barrel received within the opening of the wall of the housing, the connector barrel having a first open end, a second open end, and a body portion extending between the first and second open ends (70, 72), wherein the body portion is positioned within the opening of the wall after insertion of the connector barrel through the opening, wherein the first open end is positioned within the interior of the housing after insertion of the connector barrel through the opening, wherein the second open end is positioned external to the housing after insertion of the connector barrel through the opening, wherein a ridge on the body portion of the connector barrel is disposed proximate to the outer surface of the wall after insertion of the connector barrel through the opening, the ridge configured to block the connector barrel from falling entirely into the interior of the housing, and wherein a first circumferential bump on the body portion of the connector barrel is disposed proximate to the inner surface of the wall after insertion of the connector barrel through the opening; and - a securement component which is received within a groove at least partially defined by the first circumferential bump of the connector barrel after insertion of the connector barrel through the opening such that the securement component is positioned proximate to the inner surface of the wall, the securement component, when received within the groove, configured to block the connector barrel from being pushed or pulled towards an outside of the housing, wherein the wall is sandwiched between the ridge of the connector barrel and the securement component after reception of the securement component within the groove; and wherein the securement component comprises a clip that applies a spring force against the body portion of the connector barrel to maintain a position of the clip within the groove at least partially defined by the first circumferential bump. - a housing having a wall at least partially defining an interior of the housing, wherein the wall comprises an opening extending from an inner surface of the wall facing the interior of the housing to an outer surface of the wall opposite to the inner surface; - a connector barrel received within the opening of the wall of the housing, the connector barrel having a first open end, a second open end, and a body portion extending between the first and second open ends (70, 72), wherein the body portion is positioned within the opening of the wall after insertion of the connector barrel through the opening, wherein the first open end is positioned within the interior of the housing after insertion of the connector barrel through the opening, wherein the second open end is positioned external to the housing after insertion of the connector barrel through the opening, wherein a ridge on the body portion of the connector barrel is disposed proximate to the outer surface of the wall after insertion of the connector barrel through the opening, the ridge configured to block the connector barrel from falling entirely into the interior of the housing, and wherein a first circumferential bump on the body portion of the connector barrel is disposed proximate to the inner surface of the wall after insertion of the connector barrel through the opening; and - a securement component which is received within a groove at least partially defined by the first circumferential bump of the connector barrel after insertion of the connector barrel through the opening such that the securement component is positioned proximate to the inner surface of the wall, the securement component, when received within the groove, configured to block the connector barrel from being pushed or pulled towards an outside of the housing, wherein the wall is sandwiched between the ridge of the connector barrel and the securement component after reception of the securement component within the groove; and wherein the securement component comprises a clip that applies a spring force against the body portion of the connector barrel to maintain a position of the clip within the groove at least partially defined by the first circumferential bump.