An organic Na-ion battery is reported with ap olyanionic 9,10anthraquinone-2,6-disulfonate (Na 2 AQ26DS, 130 mAh g À1 )c athode and the Na-intercalated state (Na 4 TP) of sodium terephthalate (Na 2 TP,2 55 mAh g À1 )a st he anode. The resulting full cells deliver the maximum discharge capacity of 131 mAh g À1 cathode in 0.5-3.2 V, simultaneously maintaining the average value of % 62 mAh g À1 cathode during 1200 cycles (0.5 Ag À1 , % 4C). These results are among the best performing organic sodium-ion full cells reportedt od ate.