nec Archives – The Green Optimistic green tech news, since 2008 Thu, 11 Oct 2012 05:00:40 +0000 en-US hourly 1 https://wordpress.org/?v=7.0 2667534 NEC Effects +30% Energy-Density Lithium-ion Battery https://www.greenoptimistic.com/nec-effects-30-energy-density-lithium-ion-battery-20121010/ https://www.greenoptimistic.com/nec-effects-30-energy-density-lithium-ion-battery-20121010/#respond Wed, 10 Oct 2012 19:28:16 +0000 https://www.greenoptimistic.com/?p=26625 Rechargeable batteries are the mainstay of portable devices, such as mobile phones and laptops, to electric vehicles. A major challenge for the development of these technologies has always been battery density, that is, how much electricity storage, watt-hours [Wh] per kilogram of weight. We all remember those brick phones that charged for 10 hours and […]

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