Japanese companies StrapyaNext and Tokyo Coil Engineering claim they developed the world’s first battery charger for cell phones based on solar energy. The charger comes in the form of a phone strap.
The device is 12.5 cm long and weighs 40 grams. It takes between 6 and 10 hours for a full charge with which you can talk for up to 40 minutes. StrapyaNext promises on the product page: “As long as the sun pours light and heat on the earth!” An AC adapter can get the job done in 3 hours.
The charger is available for $19 but for the time being, only Japanese cell phones are supported.
http://www.amazon.com/Powermonkey-eXplorer-Portable-Charger-Solar/dp/B000Y9KW9G
This has been around a lot longer.
But the $20 price tag on this Japanese gadget is great.
So not the first!
I saw the first ones for my Nokia phone in 1998.
Just a clue for ya! Google…
C
This place has the best Solar Battery Chargers: http://www.earthtechproducts.com/flexible-solar-panels—portable-solar-battery-chargers.html
I have weeded through all the rest…save your time.