A method of remanufacturing a battery module, comprising: - obtaining a used battery module, the used battery module comprising: - a power assembly, the power assembly comprising a stack of battery cell assemblies, each battery cell assembly having a plurality of layers including a battery cell; - an interconnect assembly physically coupled to a first end of the power assembly to at least partially structurally support the power assembly, wherein the interconnect assembly electrically couples at least two battery cells; - a side assembly coupled to the power assembly and in contact with at least one battery cell assembly, wherein the side assembly is configured to act as a heat sink with respect to the at least one battery cell assembly; and - a plurality of terminals (24, 26, 30) electrically coupled to the power assembly, wherein the used battery module is configured to provide electrical energy at two or more voltages via different combinations of the plurality of terminals (24, 26, 30); - replacing at least a portion of the power assembly, the interconnect assembly, the side assembly, or the plurality of terminals (24, 26, 30) with a new respective portion; and - retaining at least one other portion of the power assembly, the interconnect assembly, the side assembly, or the plurality of terminals (24, 26, 30) as a used portion; wherein replacing at least a portion of the power assembly, the interconnect assembly, the side assembly, or the plurality of terminals (24, 26, 30) with a new respective portion comprises replacing at least a portion of the interconnect assembly; and wherein the interconnect assembly comprises a first ladder structure having a first series of rungs coupled to the battery cells of the battery cell assemblies so as to place the power assembly in a first electrical configuration, and wherein replacing the portion of the interconnect assembly comprises replacing the first ladder structure with a second ladder structure having a second series of rungs configured to couple to the battery cells so as to place the power assembly in a second electrical configuration, and the first and second electrical configurations are different. - obtaining a used battery module, the used battery module comprising: - a power assembly, the power assembly comprising a stack of battery cell assemblies, each battery cell assembly having a plurality of layers including a battery cell; - an interconnect assembly physically coupled to a first end of the power assembly to at least partially structurally support the power assembly, wherein the interconnect assembly electrically couples at least two battery cells; - a side assembly coupled to the power assembly and in contact with at least one battery cell assembly, wherein the side assembly is configured to act as a heat sink with respect to the at least one battery cell assembly; and - a plurality of terminals (24, 26, 30) electrically coupled to the power assembly, wherein the used battery module is configured to provide electrical energy at two or more voltages via different combinations of the plurality of terminals (24, 26, 30); - a power assembly, the power assembly comprising a stack of battery cell assemblies, each battery cell assembly having a plurality of layers including a battery cell; - an interconnect assembly physically coupled to a first end of the power assembly to at least partially structurally support the power assembly, wherein the interconnect assembly electrically couples at least two battery cells; - a side assembly coupled to the power assembly and in contact with at least one battery cell assembly, wherein the side assembly is configured to act as a heat sink with respect to the at least one battery cell assembly; and - a plurality of terminals (24, 26, 30) electrically coupled to the power assembly, wherein the used battery module is configured to provide electrical energy at two or more voltages via different combinations of the plurality of terminals (24, 26, 30); - replacing at least a portion of the power assembly, the interconnect assembly, the side assembly, or the plurality of terminals (24, 26, 30) with a new respective portion; and - retaining at least one other portion of the power assembly, the interconnect assembly, the side assembly, or the plurality of terminals (24, 26, 30) as a used portion;