Keep your portable devices charged by the #1-selling battery brand-introducing the Mophie 3516PWRBOOST2 Boost Mini External Battery. Compact and easy to carry, the power boost mini battery will keep your smartphone or wearables charged when you most need it. Available in a variety of colors, this is the companion your portable devices just cant live without. Connect any smartphone or wearable to the power boost mini batterys USB port and press the status button to start charging. The LED battery indicator tells you the power boost mini batterys charge level. Recharge your power boost mini battery by plugging the included micro USB cable into a USB wall adapter or laptop.