AT&T Impulse 4G Smartphone AA battery Powered Emergency Cell Phone Travel Charger / Re-Charger in high grade Brushed Aluminum housing! Never be left without power again using our AA Battery charger! This compact emergency charger runs on a single AA Alkaline or Lithium battery (not included). Now you can juice up any cell phone battery in minutes. This small emergency cell phone charger is also great for those on the road or traveling. Use this universal charger for travelling overseas, or as a portable and compact backup.