Based on this product's specifications, here are some alternatives and similar models
Laptop battery 2-Power 14.4V Li-Ion 2600mAh (40Wh) compatible with Dell Inspiron 1440/1750
Summary description:
Rechargeable 2-Power laptop battery with 14.4 V nominal voltage and 2600 mAh (40 Wh) Lithium‑Ion capacity. Designed as a direct replacement for Dell Inspiron 1440 and 1750, it restores runtime for document editing, web browsing and light multimedia. Lightweight (0.237 kg) and black, suitable as a spare or replacement battery to provide portable power for everyday use.