The Entrust UPS series of Uninterruptible Power Supply UPS Battery Backup systems from Para Systems-Minuteman offers line-interactive power protection for workstations, on-line, networks, small servers, routers, hubs and switches and additional business applications, inclucluding phone systems. It provides high-performance surge suppression and keeps your equipment running during a power outage. Wholesale Batteries Direct has the high quality batteries that you want to buy at discount prices to power your Para Systems-Minuteman Entrust UPS Battery Backup equipment. We carry the batteries for nearly all Entrust series UPS Battery Backup systems such as the ETR500, ETR700, ETR700p15, ETR1000, ETR1500, ETR1500p15 simulated sine wave tower UPS models and more. All of our batteries come with a full 1 year warranty. Be sure to save and re-use your existing cables and connectors, when you replace the batteries.