The i.Sound backup battery brings 16,000 mAh of charging for up to 5 USB devices. It is available at many online retailers and in AT&T stores for $99 or less.
If you are looking for a portable device that can supply power to many devices at once, the i.Sound may be a good solution for you. The 16,000 mAh is a larger battery measuring around 5.75 inches in length and around 3.25 inches in width. So, it will take up some space in your bag.Read more
Disclosure: At Story Institute and MousePad Travel, we receive compensation through iTunes, Amazon, HostMonster, and Google affiliate programs by linking to products. We are independently owned and share only our personal opinions.