Your PSCRT1100 UPS is running on fumes. Runtime's dropped, the warning beep is getting worse, and you don't have time to hunt for a generic cell that might not seat right. This is the exact cartridge PowerShield built for that unit. Two 12V 9Ah cells in a clamshell housing. Drop it in, close the lid, done. No rewiring, no guesswork on cell count. If your PSCRT1100 has been holding the line at the office or the clinic, this gets it back to full runtime before your next power hiccup. Add to cart and we'll get it out the door