Incredibly Slim - Kotech battery case more than doubles your iPhone's battery life without doubling its size (adds only 0.16in & 2.47oz). Deluxe matte exterior provides secure grip and protection</br>Featuring SYNC-THRU and LIGHT-SYNC technology - No extra Micro USB cable.Simultaneously charge your iPhone and battery case together with original iphone 6 Apple's lightning cable . When charging the phone will be full charged first</br>Easy To Use - Use your iPhone as your normally would. When your iPhone's battery is low or you need to charge your iPhone just press and hold the power button on the case. Your iPhone will then start charging. 4 LED indicators on the back of the battery case to indicate how much juice is available to your iPhone</br>Longer Battery Life - Built-in 2400 mAh capacity effectively provides an extra 11 hours 3G talktime 9 hours HD video play  9 hours web browsing or 7 hours gaming to your iPhone 6 .Easily insert your iPhone 6 into the original Apple's lightning output port .It is only 40 minutes  the iPhone 6 can be recharged from 0 to 76%</br>Updated Version - The extended battery case is made of durable material which helps protect against scratches fingerprints smudges and the wear and tear of a life on the go all without interfering with your signal</br></br>Product Description</br></br>Kotech Ultra Silm Protective Portable Smart Battery Charging Case is designed for your Apple iPhone 6/6S (4.7 inches ONLY) <br><br><b>A breakthrough design</b> <br>MFI! NO NEED TO USE / BUY ADDITIONAL Micro USB cables. You could and <b>only</b> could usyour <b>ORIGINAL APPLE cables</b> to charge the battery case AND your iPhone simultaneously. <br><b>If charge the case and phone at the same time?? it would charge for phone firstly?? the case start charging when the phone completely charged. As the voltage transformation?? we suggest separate charging is the best way.</b> <br><b