The PowerFilm AA Foldable Solar Charger is a foldable, lightweight, pocket-sized solar charger featuring removable, rechargeable AA batteries. Proprietary charging circuitry maximizes charge into the batteries, and charge lights indicate charging status and charge completion. The AA Foldable Solar Charger can charge two AA batteries in three and a half hours of full sun or four AA batteries in seven hours of full sun. The solar panels are mounted to a lightweight, weather resistant fabric that easily folds and unfolds for use and storage. Keep your AA devices powered wherever you are with the AA Foldable Solar Charger. (This product is no longer produced by PowerFilm and has been discontinued)