Based on this product's specifications, here are some alternatives and similar models
Battery Beltrona VISRBC124 compatible replacement for RBC124 UPS battery
Summary description:
Sealed lead-acid replacement battery Beltrona VISRBC124 compatible with RBC124 UPS battery models. Designed for use in uninterruptible power supply systems that require the RBC124 form factor, it provides a direct swap-in replacement to restore backup power. Suitable for maintenance or repair of UPS units, this battery ensures continued operation of connected equipment during mains outages.