Fisker's promise to bring advanced, solid-state graphene cells to the battery pack of its upcoming Emotion electric car is officially dead. Automotive-grade graphene batteries have yet to be perfected, but Fisker was poised to become the first company to utilize the technology. The batteries provide greater range and shorter charging times, but... Fisker: about those graphene electric-car batteries? Never mind
Fisker's promise to bring advanced, solid-state graphene cells to the battery pack of its upcoming Emotion electric car is officially dead. Automotive-grade graphene batteries have yet to be perfected, but Fisker was poised to become the first company to utilize the technology. The batteries provide greater range and shorter charging times, but... 
As rules to boost fuel economy and lower carbon emissions in vehicles around the world continue to stiffen, acronyms like EREV, CNG, and MPGe are becoming more and more common. Ever wonder what they all mean? This glossary is your chance to enter a veritable Twilight Zone of terminology--and find out, say, whether a PZEV is related to a PHEV... 
The 2018 Nissan Leaf will likely be revealed within the next three months, but more than 100,000 older Leaf electric cars are still silently in use on U.S. roads. Some of them, especially the lowest-range cars from the two earliest model years (2011 and 2012), have started to see significant battery capacity degradation. That was the case with... 
It's one of the most common questions among electric-car buyers: what happens if the battery fails? The answer is that all electric-car batteries are warranted against failure for either 8 years/100,000 miles or 10 years/150,000 miles, depending on which state you live in. The followup is often: OK, then, what does a battery cost once my car's out... 
With more plug-in electric vehicles on the road today than ever, automakers are working to solve an impending issue: what to do with used lithium-ion batteries. Once the batteries are no longer suitable to power vehicles, automakers must recycle or repurpose them. Now, through a partnership with The Mobility House, the Renault Nissan Alliance is... 
Ten years ago, lithium-ion cell maker A123 Systems was a hot startup and a much-publicized company. This author, in fact, profiled the company for IEEE Spectrum in the technology magazine's September 2007 issue. The six years that followed proved enormously painful for the Massachusetts company, however. DON'T MISS: A123 Systems To Recall... 
The costs and prices of electric cars are endlessly debated, not only among owners and advocates but within the industry itself. The cost per kilowatt-hour of electric-car batteries is closely held, with a few notable exceptions. One of those was the statement by GM product chief Mark Reuss that the company pays $145 per kilowatt-hour for the... ![StoreDot shows fast-charging battery cell, Cube Tech Fair, Berlin [via Periscope: Gruendermetropole]](http://images.hgmsites.net/tmb/storedot-shows-fast-charging-battery-cell-cube-tech-fair-berlin-via-periscope-gruendermetropole_100606667_t.gif)
It's one of the Holy Grails for battery researchers and electric-car advocates alike: a battery that could recharge in the same amount of time as it takes to stop for gasoline. Some of that can be provided by charging at higher rates, as Porsche's proposed 800-volt system for 15-minute fast charging would. But most of the change has to come deep... ![Tesla Model S lithium-ion battery pack in rolling chassis [photo: Martin Gillet via Flickr]](http://images.hgmsites.net/tmb/tesla-model-s-lithium-ion-battery-pack-in-rolling-chassis-photo-martin-gillet-via-flickr_100481091_t.gif)
Perhaps the biggest question in buyers' minds over electric cars is how long the batteries will last. Most new-car buyers have mobile phones whose batteries have only lasted a couple of years, perhaps less. Even as electric-car battery packs are warranted against outright failure for eight or 10 years, how much degradation should owners... ![2011 Nissan Leaf electric car after battery-pack replacement [by owner Tim Jacobsen, Concord, CA]](http://images.hgmsites.net/tmb/2011-nissan-leaf-electric-car-after-battery-pack-replacement-by-owner-tim-jacobsen-concord-ca_100599982_t.gif)
In designing, testing, and producing the Nissan Leaf, the first modern electric car sold in volume, Nissan made a design decision that some other companies didn't. It chose not to build an active thermal-conditioning system (otherwise known as cooling) into its battery pack. Instead, it relies on ambient air to shed heat—which got the maker...