This article was taken from the November 2014 issue of WIRED magazine. Be the first to read WIRED's articles in print before they're posted online, and get your hands on loads of additional content by subscribing online.
Despite mobiles' ultra-HD screens and lightning-fast processors, you won't get a full day's use out of a high-end smartphone. To ensure your phone's full before you fly, a portable charger can be a lifesaver.
This article was originally published by WIRED UK
