The White Mophie Juice Pack Air is a thin rechargeable external battery case designed to virtually double the usage time for an Apple iPhone 4/4s as well as the Verizon and AT&T version. The rechargeable Smart Battery is concealed inside of a form-fitting, low-profile, light-weight, soft-touch case. Toggle between charging and standby with the flick of a switch. Charge and sync the iPhone to iTunes without removing it from the Juice Pack air by using the included USB cable.
An integrated 4 LED status indicator shows how much juice is left at the push of a button. It also indicates the charging status. Smart Battery Technology instructs the iPhone to always drain out the Juice Pack air first. When the Juice Pack air has been drained, there is still a fully charged iPhone.