External battery pack phone chargers, also known as power banks, are small, yet powerful and work with your USB charging cable and can charge cell phones, tablets, and other devices. Quickly charge your phone with a portable phone charger anywhere. A power pack or portable charging battery pack allows you never to be without a charge, on a camping trip, at a music festival, or for a day at the beach. Bring one of our portable phone chargers with you wherever you go. You can buy an extended battery, which adds bulk to your phone, or you can invest in an external battery pack power bank. Charge your device wherever you are with a power bank portable charger.