With the latest technology and innovations, we find ourselves spending more and more time on our portable devices, whether it is communicating with others, consuming content off the world wide web, or just taking a breather from a long day with a game. The iPhone's battery can only handle so much, thus creating a need for external batteries. Bringing portable battery with customizability, UNU's new Exera Battery Case is their flagship product that will give you all the battery power your iPhone could ever desire. What sets this case apart from the rest is the ability to exchange anything off of the case to suit your style and needs. Check out all the details after the break!