Figure 3

(A) Boosted voltage when the air–cathode MFC is connected to the LVBM with 4-stage, 8-stage, and 20-stage multiplier circuits, respectively. (B) DC–DC voltage gain when the air–cathode MFC is connected to the LVBM system. The green arrow indicates the voltage of the LVBM when the LVBM was disconnected from the MFC.