Identical cells, equal current sharing: Vpack = S·Vcell, Ahpack = P·Ahcell, Wh = Vpack·Ahpack; Rpack = S·Rcell/P; loss = Ipack²Rpack. Nominal energy and lumped DC resistance only. No voltage sag curve, usable runtime, balancing, wiring/BMS losses, cell qualification or safety conclusion. Use the selected cell’s data at the actual state of charge and temperature.