Finally, a multi-cell battery that can supply enough current and voltage to power a LED is fabricated by stacking three MOF@CNT films onto a CNT film, sandwiched by two ITOcoated glass plates (see Fig. and the Experimental procedure section). As shown in Fig. and e, the battery can power the red LED of forward operating current and voltage of 1 mA and 1.6 V, respectively. It also demonstrates that stacking multiple MOF@CNT films can raise the voltage on demand without interconnects. The current is also scalable with the area and thickness of each MOF@CNT layer as parameters.