Gomeir Slim Extended Battery Case External Protective Battery Case Back Up Power Bank with Lightning Charging Port for iPhone 6/6s plus with 3700mAh Capacity(Gold) COMPACT DESIGN: Gomeir 3700mAh lithium polymer battery case provides up to 100% extra battery life with a thickness of only 0.18 inch which equals the thincess of two 50 cents coin approximately. No bulky length at all which makes the case like an regular protective case. The 360 resilient bumper and hard-shell backplate provide the best shock absorption without any signal reduction. Full access to all ports and buttons CHARGE & SYNC: Charge your iPhone and battery case with the Apple Lightning cable simutaneously. No need to organize and carry multiple cables anymore. Sync iPhone without removing the battery case SWITCH BUTTON & INDICATORS : Click the switch button to check the battery level in the battery case, each LED indicates 20% of the battery. Press the switch button for 2 seconds to turn on and off the battery case ASSEMBLY & DISASSEMBLY: The battery case provides an easy installation for sliding the iPhone into it. For disassembling, please following the instructions strictly; otherwise, it has potential to damage the charging connector of the battery case 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 for 2 seconds to charge your iPhone 6/6s Plus