It is one of the smallest and lightest portable charger with 10400mAh battery that provides almost three-and-a-half iPhone 6s charges or two-and-a-half Galaxy S6 charges. It is extremly samll only (4.02 x 3 x 0.86)inch that makes it super light weight, convenient and easy to carry everywhere. It is equipped with iSmart technology to charge your device faster than standard USB(Input: DC 5V / 2.1A Output: DC 5V / 2.1A ) It also offers multiple safety protection system to ensure devices safety. Intelligent power manage IC protect your devices against over-charged, over-discharged, over-voltage, over-current and short circuit charging accidents.