Based on this product's specifications, here are some alternatives and similar models
Lead acid battery csb battery CSB-UPS12460 12V 460W@5min AGM VRLA
Summary description:
Sealed lead acid (AGM VRLA) battery csb battery CSB-UPS12460, rated 12V with 460W output at 5 minutes. Designed for UPS systems and other backup power applications, it provides maintenance-free operation, valve-regulated construction and spill-proof design. Suitable for short-term high-power discharge, emergency backup and power-hold applications.