Mophie announced the Mophie Space Pack at CES this week, promising the new battery pack would not only double your battery life but also your iPhone 5 or 5S' storage capacity. We spent a few minutes testing the device at the company's booth today, and things already look promising. It's a wonder no one thought of this before.

It's a wonder no one thought of this before

At first glance, the Space looks identical to the last year's Mophie Juice Pack Air. Really, not much has changed — which is a good thing since the original design was so well received. The Space Pack boasts the same 1,700mAh battery as the Air, and save for a few millimeters here and grams there, both devices feel about the same.

It's the addition of an internal drive that sets the Space Pack apart. The product comes in both 16GB and 32GB varieties, potentially more than doubling your storage for photos, music, and movies. Of course, you need a means of managing those files, so Mophie is releasing its own Space app to handle the task. The app is really intuitive: it's immediately accessible to anyone who has used iOS 7. Music and movies can be played from within the app, and you can keep all your documents in one place on your phone — even ones the iPhone can't read. You can't autosync from outside the app, but it will pull in all your photos and files if you give it the correct prompt. And if you connect the device to your computer, it reads like any other hard drive.

The Mophie Space Pack is available for preorder on Mophie's site for $149.95 for 16GB and $179.95 for 32GB. It'll hit retail on March 14th.