![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... Tesla Model S battery life: what the data show so far
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... 
Tesla is currently ramping up lithium-ion battery cell production at its U.S. "Gigafactory" near Reno, Nevada. But the automaker has discussed plans for at least one additional Gigafactory, presumably to meet demand for battery cells related to large-scale electric-car production outside the U.S. While Tesla continues to mull that second battery... 
Lithium-ion battery-cell chemistry is currently dominant in electric cars, not to mention consumer electronics and other fields. But what seems to be an army of researchers thinks it can be improved. That includes one of the people who helped create lithium-ion batteries in the first place. CHECK OUT: Tesla granted patent on metal-air battery... 
Modern electric cars have developed to the point where range itself may become less of an issue than the cost of providing it. Automakers can create longer-range electric cars simply by installing larger battery packs, but that adds significant cost tot he car's single priciest component. Just ask Tesla, which sells multiple versions of its Model... 
The limitations of current lithium-ion battery-cell technology pose a hindrance to more widespread adoption of plug-in electric cars. Relatively short ranges and long charging times accorded by current lithium-ion cells still limit the appeal of electric cars in the minds of many new-car buyers. Now Samsung SDI—the South Korean electronics... 
Slightly less than three years after it was first announced, Tesla is now producing lithium-ion battery cells at its massive "Gigafactory." Billed as the largest factory of its kind in the world, the Gigafactory was conceived to provide the volume and economies of scale necessary for Tesla to produce electric cars in truly large quantities. It has... 
It's one of the most frequently asked questions by anyone hearing about a modern electric car: do I have to replace the battery? With 15 years of experience in mobile phones and more than that with laptop computers, most buyers know that lithium-ion batteries lose capacity over time. Replacing phone or laptop batteries, generally for less than... 
Even after they have degraded too much for continued automotive use, the lithium-ion battery packs in electric cars still have significant useful storage capacity. That's led several automakers to experiment with alternative uses for these "second-life" batteries in stationary energy storage. Battery packs can store energy generated by renewable...