AT&T offers a variety of Uninterruptible Power Supply UPS battery backup systems for both business and personal use. This includes the 3000, 500VA, 515, 500 AT500 and 8000 Series UPS Battery Backup systems. Wholesale Batteries Direct has the high quality batteries that you want to buy at discount prices to keep your AT&T UPS Battery Backup equipment running, in case of power surge or power outage. All of our batteries come with a full 1 year warranty.