Supercapacitors.

Not only is this an amazing one-off electric motorcycle, but it may also be a significant breakthrough in battery and supercapacitor usage to combine quick charging with bursts of on-demand power. 

If interested, read this short article about the future of electric vehicles. Until solid-state batteries are perfected for use in vehicles, the supercapacitors may help improve some of the deficiencies found in lithium-ion, only, technology. 

You can find this informative article here: Nawa Technologies