Based on this product's specifications, here are some alternatives and similar models
Battery Hikoki Multivolt BSL36A18X — 36V 2.5Ah / 18V 5.0Ah rechargeable Li-ion
Summary description:
Hikoki BSL36A18X Multivolt battery is a dual-voltage rechargeable Li‑ion pack providing 36V at 2.5Ah and 18V at 5.0Ah. Designed for Multivolt-compatible power tools, it enables use across different voltage platforms without adapters. Key features include compact form factor, interchangeable mounting, and protection circuitry for stable performance in workshop and on-site applications.