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“Automobili Estrema claims that this pack not only has a 100 kWh capacity, but will also (ONE Doubles Tesla Model S Range to Over 700 Miles With Gemini Battery) have an energy density of around 227 Wh/lbs thanks to weighing only 661.39 pounds. The whole car—with the battery pack installed—will also only weigh around 3,300 pounds, meaning the battery is only about 20 percent of the Fulminea's total weight. The rest? Each wheel will be driven by a single motor, much like the Rivian R1T is, the quad-motor setup results in 2,040 hp, so Automobili Est claims the all-electric hypercar will hit 200 mph in less than 10 seconds. [325mile range]”

3300lbs is amazing for a battery/car. If this is true it’s kind of earth shaking.
Yes not sure about the weight figure but a partial explanation they gave is “a mix of batteries and ultracapacitors to make a "hybrid" battery pack.”
 
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