There exist smartphone cases that have built-in batteries to prolong the life of the device, but the Cord-On-Board Case addresses the root of the problem. Instead of lugging around a heavy add-on, this protective case ensures that people will always have access to their charger and in a much lighter format.
Created by CaseInity, the Cord-On-Board Case may make a person's iPhone bulkier than the average case since it needs to have room enough to store the cable, but it does offer a foolproof way to always have a fully charged phone on hand. Even extra battery backs run out. Nevertheless, the Cord-On-Board Case doesn't not have enough room to hold the square transformer, so a person would have to have access to a USB port in order to charge their iPhone.