... padded laptop sleeves, Bladder pouch and channels to run the tube to the shoulder strap, Includes a 2,200mAh ... Li-Ion battery pack with 3 voltage settings to ... for common cell phones, which eliminate the need to use a car charger for common devices,.The ... are tough, light weight, waterproof, and generate up to 4 watts of power. The Voltaic Backpack is ...