For the replacement battery please see quick find 85520. The back ups cs provides professional grade power protection for office and home office systems. Battery powered and surge protected power outlets, built in phone fax modem line dsl compatible protection, safe system shutdown software with sophisticated power management features and pro active audio visual status indicators ensure office systems and their valuable data are protected from dangerous power surges, spikes and blackouts. Serial or usb connectivity gives users more flexibility making installation quicker and easier. Easy access to a hot swappable, user replaceable battery also makes servicing the back ups cs hassle free. These features along with its classic styling make the back ups cs a perfect choice for protecting your important office and home office systems. 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.