NaV6O15 anode materials are prepared by the hydrothermal method and the precursor calcinations. The phase structure and the morphology of as-synthesized materials are characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM) and scanning electron microscopy (SEM). The cyclic voltammogram curves of NaV6O15 electrodes in the saturated LiNO3 electrolyte show that there exist three redox couples, which is in accordance with the charge-discharge voltage-capacity curves. The electrochemical cycle behaviors of LiMn2O4//NaV6O15 aqueous rechargeable lithium battery (ARLB) at the current densities of 50, 100, 200, 500, 800 and 1000mAg−1 indicate that this ARLB has larger discharge capacity and better cycle ability at higher current density than that at lower current density, which is much more different from those in the traditional lithium ion battery. Most notably, this abnormal electrochemical phenomenon is very crucial in the applications of the large-scale power source and the energy storage devices.