Keep your portable devices charged by the #1-selling battery brand-introducing power boost Universal battery by mophie. Compact and easy to carry, the power boost battery will keep your smartphone or tablet charged when you most need it. Available in a variety of colors, this is the companion your portable devices just can't live without. Connect any smartphone or tablet to the power boost battery USB port and press the status button to start charging. The LED battery indicator tells you the power boost battery charge level. Recharge your power boost battery by plugging the included Micro USB cable into a USB wall adapter or Laptop.