The PowerFilm 10,000mAh Dual USB Power Bank is a great accessory for PowerFilm solar panels. Simply recharge the powerbank from the solar panel (using the RA-2 and RA-14B) and then charge your USB devices whenever you'd like (even at night). It has a durable aluminum housing and is small enough to fit in your pocket.
Input: 5V DC, 2.1A (Max)
Capacity: 3.7V DC, 10000mAh = 37Wh
Output: 5V DC, 2.4A (Max) 7000mAh = 35Wh