yeah... for how long? Power and energy are frequently confused. Power is the rate at which energy is generated and consumed. To answer your question the batter

yeah... for how long? Power and energy are frequently confused. Power is the rate at which energy is generated and consumed. To answer your question the battery rating should preferably be given in Amp-hours or kWh. I suspect the author wanted to highlight the energy density of the battery, connected to a charger the battery should be able to provide 10kW continually for its life. 10kw/kg is actually impressive.