View larger Energi Sliding Power Case - Blue The ENERGI Power Case is real world tested. So thin, it"s hard to believe it packs an additional 9 hours of talk time. It adds only add 9mm to the thickness of an iPhone. When you want to charge your phone simply push the button on the back of the case and it starts charging your phone. Choose the Right Color for You We include 2 slim-line cases; 1 black, 1 colored (available in Lime, Red and Blue), which slides out of the charging sleeve so your phone remains protected when you don"t need the extra charge. No Need to Carry Two Cases Once your phone is charged, simply remove the exterior charging sleeve to reveal a slim-line inner case for traveling light. View larger Slide off the battery The accent shields slide out of the charging sleeve so your phone remains protected when you don"t need the extra charge. View larger Light and Stylish Thin, compact design adding just 1/4 inch (9mm) to thickness and 1/2 inch (10mm) to length. It weighs just 3.25 Ounces (92 Grams) View larger On/Off button and LED Light Push the On/Off button to start or stop charging and activate the LED light that indicates remaining battery capacity. View larger Includes Two Accent Shields The accent shields are designed to allow you to protect your phone when you are not using the battery. Includes 2 Accent Shields View larger Rechargeable Battery Rechargeable 2,500mAh internal battery to keep you charged on the go. It provides an additional 9 hours of talk time to your iPhone. View larger Sleek Design Easy to slide in and out pocket due to its soft touch material.