A battery module, comprising: - a housing comprising two side portions (68, 70) opposite to each other and one or two end portions (64, 66), wherein the side portions (68, 70) comprise retaining tabs, the retaining tabs defining a first interior surface and a second interior surface opposite and spaced apart from the first interior surface; and - a compressed cell assembly disposed within an interior space of the housing between the first and second interior surfaces of the retaining tabs, comprising: - a plurality of prismatic battery cells arranged in a cell stack comprising a first end and a second end disposed opposite the first end; and - a first retaining wall disposed between the first end of the cell stack and the first interior surface of the retaining tabs, wherein the first retaining wall comprises a first surface in contact with the first end of the cell stack, and a second surface opposite the first surface that contacts the first interior surface of the retaining tabs, - a second retaining wall disposed between the second end of the cell stack and the second interior surface of the retaining tabs, wherein the second retaining wall comprises a respective first surface in contact with the second end of the cell stack, and a respective second surface that contacts the second interior surface of the retaining tabs, wherein the respective first surface is opposite the respective second surface, wherein the first and second interior surfaces maintain the compressed cell assembly in a compressed state having a compression force above a predetermined threshold, wherein the housing of the battery module does not include an actuating clamping mechanism, wherein the first and second interior surfaces of the retaining tabs, respectively, are in contact with only a portion of the second surface of the corresponding first and second retaining walls (120, 124), and wherein the battery module comprises a circuit board mounted to the second surface of the first retaining wall in a region not in contact with the first interior surface of the retaining tabs. - a housing comprising two side portions (68, 70) opposite to each other and one or two end portions (64, 66), wherein the side portions (68, 70) comprise retaining tabs, the retaining tabs defining a first interior surface and a second interior surface opposite and spaced apart from the first interior surface; and - a compressed cell assembly disposed within an interior space of the housing between the first and second interior surfaces of the retaining tabs, comprising: - a plurality of prismatic battery cells arranged in a cell stack comprising a first end and a second end disposed opposite the first end; and - a first retaining wall disposed between the first end of the cell stack and the first interior surface of the retaining tabs, wherein the first retaining wall comprises a first surface in contact with the first end of the cell stack, and a second surface opposite the first surface that contacts the first interior surface of the retaining tabs, - a second retaining wall disposed between the second end of the cell stack and the second interior surface of the retaining tabs, wherein the second retaining wall comprises a respective first surface in contact with the second end of the cell stack, and a respective second surface that contacts the second interior surface of the retaining tabs, wherein the respective first surface is opposite the respective second surface, wherein the first and second interior surfaces maintain the compressed cell assembly in a compressed state having a compression force above a predetermined threshold, - a plurality of prismatic battery cells arranged in a cell stack comprising a first end and a second end disposed opposite the first end; and - a first retaining wall disposed between the first end of the cell stack and the first interior surface of the retaining tabs, wherein the first retaining wall comprises a first surface in contact with the first end of the cell stack, and a second surface opposite the first surface that contacts the first interior surface of the retaining tabs, - a second retaining wall disposed between the second end of the cell stack and the second interior surface of the retaining tabs, wherein the second retaining wall comprises a respective first surface in contact with the second end of the cell stack, and a respective second surface that contacts the second interior surface of the retaining tabs, wherein the respective first surface is opposite the respective second surface, wherein the first and second interior surfaces maintain the compressed cell assembly in a compressed state having a compression force above a predetermined threshold,