A battery pack comprising: a housing having a first end , a second end , a longitudinal axis (B) extending between the first end and the second end , a first surface, and a second surface ; electrical terminals positioned within the housing and configured to engage and electrically couple with electrical terminals of a power tool ; and a latch mechanism including a body having a longitudinal axis (C), characterized by further including an actuator , and a latch member movable through an aperture in the second surface , the actuator and the latch member being positioned on opposite ends of the body and separated by a gap ; and wherein the actuator is arranged to move within an aperture in the first surface and the actuator includes: a distal end relative to the longitudinal axis (C) of the body of the latch mechanism and positioned adjacent the first end of the housing, a proximal end relative to the longitudinal axis (C) of the body of the latch mechanism and spaced apart from the distal end , the distal end is positioned above the proximal end , and an actuating surface that extends between the distal end and the proximal end and slopes inwardly and downwardly relative to the housing of the battery pack . a housing having a first end , a second end , a longitudinal axis (B) extending between the first end and the second end , a first surface, and a second surface ; electrical terminals positioned within the housing and configured to engage and electrically couple with electrical terminals of a power tool ; and a latch mechanism including a body having a longitudinal axis (C), characterized by further including an actuator , and a latch member movable through an aperture in the second surface , the actuator and the latch member being positioned on opposite ends of the body and separated by a gap ; and wherein the actuator is arranged to move within an aperture in the first surface and the actuator includes: a distal end relative to the longitudinal axis (C) of the body of the latch mechanism and positioned adjacent the first end of the housing, a proximal end relative to the longitudinal axis (C) of the body of the latch mechanism and spaced apart from the distal end , the distal end is positioned above the proximal end , and an actuating surface that extends between the distal end and the proximal end and slopes inwardly and downwardly relative to the housing of the battery pack . a body having a longitudinal axis (C), characterized by further including an actuator , and a latch member movable through an aperture in the second surface , the actuator and the latch member being positioned on opposite ends of the body and separated by a gap ; and wherein the actuator is arranged to move within an aperture in the first surface and the actuator includes: a distal end relative to the longitudinal axis (C) of the body of the latch mechanism and positioned adjacent the first end of the housing, a proximal end relative to the longitudinal axis (C) of the body of the latch mechanism and spaced apart from the distal end , the distal end is positioned above the proximal end , and an actuating surface that extends between the distal end and the proximal end and slopes inwardly and downwardly relative to the housing of the battery pack . a distal end relative to the longitudinal axis (C) of the body of the latch mechanism and positioned adjacent the first end of the housing, a proximal end relative to the longitudinal axis (C) of the body of the latch mechanism and spaced apart from the distal end , the distal end is positioned above the proximal end , and an actuating surface that extends between the distal end and the proximal end and slopes inwardly and downwardly relative to the housing of the battery pack . <EOS>