Based on this product's specifications, here are some alternatives and similar models
Sealed Lead-Acid Battery FIAMM 12FGHL34 12V 8.4Ah, 10-year design life
Summary description:
FIAMM 12FGHL34 is a sealed lead-acid (SLA) battery with 12V nominal voltage and 8.4Ah capacity, designed for a 10-year design life. It provides maintenance-free backup power for UPS systems, security devices, alarms and other standby applications. The compact, valve-regulated design enables long shelf life, reliable discharge performance and easy installation in confined spaces.