The 12-outlet Tripp Lite AVR900U is the wrong intersection of perfectly fine separate features in an otherwise well-made model. Its reasonable battery size could support a tricked-out computer system with multiple displays and peripherals for a few to several minutes during a power outage. The line-interactive approach incorporated in its design provides fast power switch over (as quick as a few milliseconds) along with constant power conditioning to correct for minor fluctuations without wearing out the internal battery. On the other hand, the AVR900U relies on simulated power switching instead of a "pure" sine wave. That means it's not the right choice for computers with active power factor correction (PFC).