Tripp Lite makes it pretty hard to find a replacement battery. This one worked for me. I saved me from sending the whole rack mounted UPS back to Tripp Lite. I was about to just punt, trash the unit, and buy a replacement rack mount UPS from APC. But this battery saved me from doing that. I opened up the Tripp Lite unit and looked at the dimensions of the battery and power ratings to verify that the battery specifcations matched. The replacement was easy to do.