The bus uses a hybrid system that combines the hydrogen fuel cells with high power batteries.

VOA: special.2009.09.07

They discovered a drop in pressure in the fuel cells that supplied electricity.

VOA: special.2009.06.24

Then another problem developed with the same fuel cells.

VOA: special.2009.06.24

These fuel cells powered the communications and computer systems.

VOA: special.2009.06.24

But the fuel cells were producing too much water.

VOA: special.2009.06.24