The MBK and MBK-E 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 MBK and MBK-E UPS Battery Backup equipment. We carry the batteries for nearly all MBK and MBK-E series UPS Battery Backup systems such as the MBK 300i, MBK 320, MBK 320i, MBK 520, MBK 550E 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.