Based on this product's specifications, here are some alternatives and similar models
Laptop battery HP model HSTNN-DB9N / BN03051 — 51 Wh, 4.45 Ah, Li-ion
Summary description:
Replacement laptop battery HP HSTNN-DB9N (BN03051) with a rated capacity of 51 Wh (4.45 Ah) and Li-ion chemistry. Designed as a direct substitute for compatible HP notebooks to restore battery runtime. Suitable for mobile work, travel, and daily use where original HP battery specifications are required. Provides standard operating voltage and compact form factor for easy installation.