Ultralight fuel cells provide high energy output for bipolar plates, which take up the largest portion of the stack’s weight, we applied ultrathin metal developed with our proprietary technology and successfully reduced the total weight. A key material used in the stack is MEA (Membrane Electrode Assembly). This enables high energy output and durability for our fuel cell Powerpack. And thanks to the design of the stack structure, which maintains even energy output among cells, high energy output of the fuel cell Powerpack remains stable during flight.