Energy supply for:
Cheap miniatur solar cells for concentrator (LCPV)
Solar lights, for example Solar for all
Energy with existing lighting fittings "Recycling of light":
Positioning systems, for example Patient wristbands, GPS
Microelectronics - Sensors
Car keys
Total Logistics - active RFID
Animal identification (ear tags)
Time Recording (e.g. Sports)
Authentication of persons
Solar Charger
http://iphonesolarcharger.info/
energy for an effective and cheap electric scarecrow