An environment friendly battery made from waste material, that can work continuously for 72 hours with no electricity required for its charging, has been developed by a private educational institut
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/environment-friendly-battery-made-waste-material
[2] http://admin.indiaenvironmentportal.org.in/category/newspaper/statesman-new-delhi
[3] http://admin.indiaenvironmentportal.org.in/category/thesaurus/waste-energy
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/leds
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/power-industry
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/renewable-energy
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/energy-technology
[8] http://admin.indiaenvironmentportal.org.in/category/thesaurus/energy