The Enersys Datasafe HX battery series is designed specifically for UPS applications. With a compression grommet designed to give this battery a long lifetime, the 12HX505 is battery made to last. It's a VRLA battery with 103 lbs of engineering geared toward UPS (uninterruptible power supply) and IT applicaitions. Don't second guess when it comes to back-up power. Get a reliable battery, like this 12V model from Enersys.