mophie is a California-based, award-winning designer and manufacturer of mobile intelligent devices and accessories. Widely acclaimed for innovative solutions, mophie is the proud developer of the juice pack, the first ever "Works With iPhone" portable battery case certified by Apple Inc. The Juice Pack Air is a powerful 1700mAh protective battery case made for iPhone 5s/5. Get up to 100% extra battery with the flip of a switch and stay fully charged through the late nights. Available now in gold.