For hikers and those on the go, check out the Voltaric System smartphone charger. This device also accommodates other handheld devices.
The Voltaic System boasts four times the power and twice the battery storage of most other solar charges on the market. The charger has the ability to charge smartphones, cell phones, mp3 players, tablets, digital cameras, portable gaming devices and more. The actual device functions through two 2.0 watt solar panels that generate power via sunlight. The panels are waterproof, lightweight and durable.
While the charging times vary, expect a full charge of a typical phone to take around five hours. One hour will provide about 1.5 hours of talk, time. Even when you're not in the sun, you can use the charger via a USB port to charge your devices. This handy device clips comfortably onto the back of any backpack.