Based on this product's specifications, here are some alternatives and similar models
Battery canister IBM Node Canister Battery 00Y4643 12V 5Ah for server backup and node power
Summary description:
IBM Node Canister Battery 00Y4643 is a 12V 5Ah battery module designed for use in compatible IBM server systems and node assemblies. It provides reliable backup power for short-term outages, supports server maintenance and controlled shutdowns, and helps preserve data integrity. Intended for replacement or spare use in OEM-supported hardware.