cheaper to just buy them.
this way you have a
Solar Lipo charger.
i got 5 and Thay work good for all types of things.
and if you want more power just change out the Lipo cell for a larger one
mine are now 6800mAh
if you look you can get them for low as $6.00 a pop free S/H as i did.
http://cgi.ebay.com/USB-Solar-Batter...item1e5d6656f5
Or
http://cgi.ebay.com/Solar-Power-Port...item3f04469537
Just Fix It !!!
I have been into electronics for 30+ years
and am a licensed Electronics Technician for over 26 years now.