In this report, we deploy a facile ball-milling technique to produce modified graphites toward boosted lithium/sodium storage performance and long-term cyclability. Specifically, the modified graphite after ball-milling for 120 h (BMNG-120h) shows the best performances. It delivers a reversible Li storage capacity of similar to 842 mAh g(-1) (500 cycles, 1 C) and Na storage capacity of similar to 150 mAh g(-1) (250 cycles, 0.1 C). These superior performances can be first ascribed to the decreased sheet size and thickness, increased surface area, and interlayer spacing of the graphites upon ball-milling. Moreover, cyclic voltammetry tests imply that the diffusion- and capacitive-controlled processes coexist and contribute to the high capacity. Galvanostatic intermittent titration technique measurements further indicate a faster Li+ diffusion process. Finally, the introduction of oxygen modified characteristics during the ball-milling process may also accelerate the ion and electron leading to a superior performance of the electrode.