A battery pack comprising: a plurality of cells arranged substantially adjacent to each other such that longitudinal centerlines of each of the cells are aligned substantially in parallel with each other in a first direction; a physical cell connection assembly that includes a cell-retaining portion disposed to contact each of the cells to hold the cells in a housing; an electrical cell connection assembly that includes a plurality of cell connectors disposed to contact at least selected ones of the cells in groups to facilitate electrical connection of the cells associated with each of the groups, a contact portion of each of the cell connectors being disposed to electrically connect electrodes of at least two of the cells; and a printed circuit board (PCB) configured to monitor electrical parameters associated with the cells based on electrical communication between the PCB and the electrical cell connection assembly, wherein at least one cell connector of the cell connection assembly includes a holding portion that engages the physical cell connection assembly and a fixing portion that extends substantially perpendicular to the plane of the PCB to engage the PCB to facilitate holding of the PCB relative to the physical cell connection assembly, wherein the fixing portion includes at least one connecting tab configured to pass through a preformed aperture in the PCB, wherein the fixing portion includes a retaining clip that secures the at least one cell connector to the PCB, wherein the retaining clip includes a retention tab that is compressed by insertion of the retaining clip through the PCB and expands responsive to the retention tab penetrating through to an opposite side of the PCB relative to a side of the PCB through which the retention tab is inserted, the retention tab in an expanded state preventing withdrawal of the retaining clip from the PCB. a plurality of cells arranged substantially adjacent to each other such that longitudinal centerlines of each of the cells are aligned substantially in parallel with each other in a first direction; a physical cell connection assembly that includes a cell-retaining portion disposed to contact each of the cells to hold the cells in a housing; an electrical cell connection assembly that includes a plurality of cell connectors disposed to contact at least selected ones of the cells in groups to facilitate electrical connection of the cells associated with each of the groups, a contact portion of each of the cell connectors being disposed to electrically connect electrodes of at least two of the cells; and a printed circuit board (PCB) configured to monitor electrical parameters associated with the cells based on electrical communication between the PCB and the electrical cell connection assembly, wherein at least one cell connector of the cell connection assembly includes a holding portion that engages the physical cell connection assembly and a fixing portion that extends substantially perpendicular to the plane of the PCB to engage the PCB to facilitate holding of the PCB relative to the physical cell connection assembly, wherein the fixing portion includes at least one connecting tab configured to pass through a preformed aperture in the PCB, wherein the fixing portion includes a retaining clip that secures the at least one cell connector to the PCB, wherein the retaining clip includes a retention tab that is compressed by insertion of the retaining clip through the PCB and expands responsive to the retention tab penetrating through to an opposite side of the PCB relative to a side of the PCB through which the retention tab is inserted, the retention tab in an expanded state preventing withdrawal of the retaining clip from the PCB. <EOS>