Stored energy can power GPS location-based transmitters or 1.8 volt LED
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/iit-bombay-fabricates-wearable-supercapacitor
[2] http://admin.indiaenvironmentportal.org.in/category/newspaper/hindu-new-delhi
[3] http://admin.indiaenvironmentportal.org.in/category/thesaurus/energy-technology
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/iit-bombay
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/energy-storage