@ Patricia.
This is what I bought on eBay for my iPhone.
NEW iPod & iPhone Solar Powered Battery Charger - White
Price: $72.95
I put it in a basket (without the 'phone) at 9.00am on a semi-cloudy day, and by 3.00pm it had charged up to full.
It weighs 4 ozs.
I am sure that you would be able to find something similar where you are.
If you want to know more, let me know.
Cheers.
