check this out:

http://www.ebay.com/itm/281207642774

Just ordered that, dunno if it's good but feedback is quite positive and price is so low that I wouldn't mind if I would have to throw it away. Solar panels are SO low energy output that you would probably miserably fail if you rely on one - do not recommend. There's a good option of charger from burner like this http://www.biolitestove.com/campstov...view/features/ but I plan to camp w/o cooking equipment so you decide.