Security through emergency powerAn APC Back-UPS has a built-in battery that ensures that all connected equipment. such as a NAS. router. modem and media box. continues to work if the power goes out. In addition. this APC emergency power supply can also automatically shut down a NAS or PC in time via the USB connection. Useful when the APC ups is almost empty. This prevents downtime. damage to equipment. and loss of data.SafetyIn addition. this safe APC Back-UPS protects valuable equipment against peak voltage caused by lightning strikes. for example.InsuranceDespite the high risk of lightning strikes and surges. APC has full confidence in its products and offers this APC Back-UPS:- Equipment protection policy of 100.000 eurosExtend the lifespanThe internal battery cartridge (RBC17) can be replaced easily. safely and independently by the user. This way you can easily and cheaply extend the lifespan of the APC Back-UPS BK650EI.Warranty extensionThe factory warranty of the BK650EI is 2 years and you can upgrade to 5 years with the APC service pack (WBEXTWAR3YR-SP-01A).The re-invention of the most relied upon desktop UPS in history: the Back-UPS! The Back-UPS CS provides professional-grade power protection for office and home office systems. Battery powered & 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.