If you never know exactly where or when you're going to be able to charge your phone again, the Original Samsung Universal Micro USB Data Cable w/ Travel Adapter, ETAOU80JBE - Black is definitely for you. With the Micro USB data cable, you can charge and/or sync your compatible device by plugging it into any USB port (laptop, desktop, etc.). But if you don't have a USB port nearby you can just plug the Data Cable into the Travel Adapter, which can be inserted into any wall outlet! Pretty neat stuff! This functionality will allow you to charge your mobile device anywhere and anytime you want, even if you're at the airport creating a huge business PowerPoint and need to access information from your phone!