http://en.akihabaranews.com/38918/environment/sanyo-lithium-ion-batteries-to-backup-traffic-signals-in-japan?utm_source=rss&utm_medium=rss&utm_campaign=sanyo-lithium-ion-batteries-to-backup-traffic-signals-in-japan Live from Japan ! Thu, 23 May 2013 21:53:00 +0000 hourly 1 http://wordpress.org/?v=3.5.1 http://en.akihabaranews.com/38918/environment/sanyo-lithium-ion-batteries-to-backup-traffic-signals-in-japan#comment-60556 DEVAXTATOR Wed, 10 Mar 2010 11:17:45 +0000 http://www.akihabaranews.com/?p=38918#comment-60556 i dont understand why this is such a news.
here in Portugal we use Solar power and wind power(no so usual but in some parts of the country it exists) to our traffic lights and in our highways. in the night its uses the acumulated solar charge.
http://farm4.static.flickr.com/3352/3273694883_c12581db5f.jpg

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