For Mophie Juice Pack Helium iPhone 5 / Mophie Juice Pack Air iPhone 4/4s Life-Tech 3.1a Dual USB Car Charger w/ Data Cable Dual 2-Ports USB sockets allow you to charge 2 devices at once Output: 5V-3100mA Output Charge most devices that use a USB charging cable, (iPod, iPhone, cell phone, MP3, PDA, Blackberry etc..)) IC Chip recognizes a full battery & automatically switches to saver mode Elimate excessive space by bulky charger with this slim and compact usb charger