The docking station holding the fuel cell and battery combination will make a Thinkpad one-third to one-half thicker and deeper.
The fuel cell and battery powered hybrid taxi provides a 250 mile driving range with rapid refuelling, all within the confines of the body of a conventional London taxi.
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To have a useful range of 480km (300 miles) or so, an electric car using a fuel cell instead of a battery pack would require around 9kg (20 pounds) of hydrogen.
How this happens remains to be seen, but there are four distinct options on the table: hybrid cars, plug-in hybrid cars, battery electric cars, and fuel cell cars.
In a survey of auto industry executives conducted by KPMG, respondents expected that among electric vehicles, hybrids will have the highest customer demand by 2025, followed by fuel-cell vehicles, outdoing the demand of battery-powered cars.
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But, of course, a fuel-cell car is an electric car, albeit with a complicated hydrogen battery.
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If the EPA uses the same calculation for fuel cells as for battery vehicles, whereby the energy used to charge the battery is counted and deducted from the mileage label, fuel cell vehicles would be rated at about 80 mpg.
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The fuel-cell on a chip is coming along fast and could well replace the rechargeable battery within a decade.
Despite the slow sales of battery-powered cars, the head-start they have over fuel-cell cars gives them a definitive advantage in terms of price.
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This stack inside a flow battery, where the electrolyte meets the electrodes, looks a lot like a fuel cell.
Furukawa Battery, the Tokyo-based supplier of power systems , is commercializing a magnesium fuel cell technology that generates electricity using salt water as an electrolyte.
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