Dynatech offers Uninterruptible Power Supply UPS battery backup systems for both business and personal use such as the SPF-550-2, SPF-560-2 UPS Battery Backup systems. Wholesale Batteries Direct has the high quality batteries that you want to buy at discount prices to keep your Dynatech UPS Battery Backup equipment running, in case of power surge or power outage. All of our batteries come with a full 1 year warranty.