Mobile business professionals, multimedia experts and persistent conversationalists can now fully utilize their mobile phones and Bluetooth headsets - without the worry of a dead battery! The compact, attractive and wire-free Motorola Portable Power P790 battery fits in your purse or pockets easily, the pre-charged P790 plugs into the mini-USB port on your Motorola phone or Bluetooth headset for instant power - no wall outlets, no wires! The Motorola Mini USB to Micro USB Adapter lets you use your Motorola Portable Power P790 battery to charge devices with a micro USB power port.