In the e world where businesses can't stop and downtime is measured in dollars, american power conversion apc provides protection against some of the leading causes of downtime, data loss and hardware damage power problems and temperature. As a global leader in power availability solutions, apc sets the standard in its industry for quality, innovation and support. Its comprehensive power solutions, which are designed for both home and corporate environments, improve the manageability, availability and performance of sensitive electronic, network, communications and industrial equipment of all sizes. Battery kit rbc18 fits the following apc ups systems bay450 ps250 ps250i ps450 ps450i su5005 please note networking components such as switches, routers, ups and wireless devices require that speeds and standards be consistent throughout the network to gain optimum performance. To avoid compatibility clashes or for advice, please contact us on solutionsebuyer.com.