INT BATT FOR GXT2-6000RT208 144VDC With more than one million power and environmental control systems installed throughout more than 100 countries, Liebert has more ways to protect sensitive electronics than anyone. Liebert's power protection line offers the broadest range of Uninterruptible Power Supplies in off-line, on-line and line-interactive topologies and communications. Liebert believes that collaborating with its customers to improve how the company builds, markets and supports its products and services is the only way to maintain its world-class standards.