Q. How effective is the solar panel on the charger?
A. The extent of the charge you get will be dependent on the strength and duration of the direct sunlight that the unit receives. In any case, you will not be able to fully charge the unit by solar means - this is because the panel is small and is only capable of a partial charge - this is why the solar feature is for emergencies only - but it should get your battery to one or two LEDs lit (that's 25-50% power) - sufficient to get your device charged.
Q. Where is the free hand towel promised with the Microfiber Journey Towel?
A. The hand towel is packed along with the large size towel in the breathable bag provided; it is not provided as a separately packaged item.