Power up with Incipio’s award winning offGRID™ PRO case for iPhone 5. Two extra-slim, interchangeable batteries provide a combined 4000mAh of portable power for an additional 20 hours of talk time and over 100 hours of audio. Enjoy the convenient backup battery charger that charges your 2 portable batteries at the same time. Winner of CES Best of Show, the ultra-slim offGRID™ PRO case triples battery life for additional surf, download, stream and talk time. Recharge your life and upgrade to Incipio's offGRID™ PRO today!