The mophie 2030 juice pack reserve micro is a compact external battery made for smartphones and micro USB devices. Cased in an aesthetic fit for on-the-go style enthusiasts, you'll be sure to travel light. Give your smartphone extended battery life. Its lightweight, compact design with a convenient key ring means you’re always ready for a quick charge whenever you need it. By integrating new elements into the design, the juice pack reserve micro has a super compact keychain and hidden cables.