My current purchase of the SmartPro LCD 120V 1500VA 900W Line-Interactive UPS AVR Tower LCD USB 10 Outlets is also my third purchase. The first I bought in August, 2013, the second in August, 2014. Both the older units are all still in service, no battery replacements, no disappointments, and no trouble. We have had at least one tropical storm, one lightning strike that cooked the power supply for my HVAC, and more than one power outage of over an hour because we live in a neighborhood with aging utility infrastructure. The units replaced various other lesser units that lasted three or four years and needed batteries, or just plain died. These have screens that allow me to read their health and (presumably) anticipate battery and function problems. I added the most recent unit to protect my home theater electronics. Each power fluctuation, flicker, or plain old outage, takes my whole system down. Sometimes everything figures out what it needs to do, but sometimes not. That requires me to spend time remembering and helping all the gadgets to renew their handshake. That isn't much fun. Enter the Tripp-lite SmartPro. I also know that my delicate electronics will last longer because of the steady stream of dressed and clean power. No spikes, brownouts, etc. I have always relied on Tripp-Lite for quality electrical solutions. This product extends the legend for me.