Based on this product's specifications, here are some alternatives and similar models
PowerWalker BP I240R-20x9Ah Battery Pack 12V 9Ah
Summary description:
The PowerWalker BP I240R-20x9Ah is a high-capacity external battery pack designed for compatible UPS systems. Featuring a 12V voltage and 9Ah capacity, this black battery unit provides extended runtime and reliable backup power for critical equipment. It is engineered for seamless integration with uninterruptible power supply setups to ensure continuous operation during power outages.