Powerskin has introduced Pop’n ($80), an external 2000 mAh battery charger that affixes to the back of an iPhone 5, using a dangling Lightning plug for connectivity. Pop’n can adhere to iPhones and some existing iPhone cases by using small, flexible suction cups; the size of the Lightning connector will determine whether it works with a given case. As one of the first Apple-approved external battery chargers for iPhone 5, Pop’n uses…
