Meet the Everjuice STROM: a battery pack that snaps onto your Apple wall charger to charge along your iPhone. It has a portable design, so you can take it with you everywhere you go. Better yet, you will never forget to keep it charged. STROM comes with KEYBLE, which is an ultra-portable charging cable for your phone.
STROM has a 3400 mAh battery inside to charge your iPhones multiple times, faster. The above video provides more information about the device.