I posted a question in the fuze side I ment to post here. Anyway I have an answer to my question about charging up in the outdoors my case a raft trip.
I found two item that fit the bill.
One a USB charger that uses AA batteries to recharge the mp3 player or cell phone.
Two solar charger that charges a built in 2600mah battery then that battery charges the player.
Thats the one I bought. It is from Hong Kong so it will be awhile till I get it. I’ll post how it works when I test it.