Next month, I'm planning on spending some time on the Route Vert in Quebec. Among other stuff, I'll be bringing my headlight (needs AAA batteries), taillight (AAA), mp3 player, cell phone, and maybe my GPS (AA batteries). The things that take batteries just need more batteries to keep them happy, and I can get those on the way.
Any good recommendations for how to keep the cell phone and mp3 player charged? I plan on camping, so I don't think I can just plug them in every night.