Rayovac 7 Hour Power USB Backup Charger with Micro USB and Batteries Included (PS73-4B) Powered by 4 Rayovac alkaline AA batteries, included, that provide up to 7 hours of talk time, based on Samsung Galaxy SII and iPhone 4S models (best with Polaroid AA batteries) Instant backup power for your USB powered devices. Compatible with all USB power cords an Apple 30 Pin cable and a micro USB cable are included, but you can use your own cords including the iPhone 5 Lightning cable Batteries are replaceable so you can use the power pack over and over LED light indicators show power and charge status Instant Emergency Power for your mobile device, works with Apple 30 Pin connector and Micro USB connector products Powered by 4 Rayovac Alkaline AA batteries with 10 year battery storage life, (included) batteries are replaceable, use the power pack over and over Includes one Apple 30 Pin and Micro USB cord, compatible with most USB powered devices, including the new iPhone5 Lightning cable, cable not included Great for travel, emergencies, kids, storm preparedness and more, outlet-free power, no electricity needed LED Fuel Gauge monitors power and charge status