The Mophie 2107JPAIP5RED is an ideal case for the everyday 9-5er and for those whose day doesnt always end when they leave the office. Lighter and thinner than previous generations, but packed with more power to make sure your phone can keep up with your busy lifestyle. Double your power up to 100% extra battery with the flip of a switch. Turn on the case when your battery runs low to stay fully charged through late nights. The juice pack air ensures you have more than enough power packed into a streamlined protective case so your ready to take on the day.