Google Nexus 7 II Smartphone AA Battery Emergency Travel Charger and Re-Charger. New lifetime brushed aluminum housing! Unlimited uses and recharges, never be left without power again! Lifetime emergency charger runs on a single AA Alkaline, Rechargeable, or Lithium battery (not included). Juice up any battery in minutes, using as many AA batteries as needed. 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.