Based on this product's specifications, here are some alternatives and similar models
Battery Green Cell DE102V3 for DELL Latitude E5250 E5450 E5550, 7.6V 6200mAh LiPo, black
Summary description:
Rechargeable battery Green Cell DE102V3 designed for Dell Latitude E5250, E5450 and E5550 notebooks. Lithium Polymer (LiPo) cell with nominal voltage 7.6 V and capacity 6200 mAh. Supplied as a single black pack, it replaces the original battery to restore runtime for mobile work, travel and everyday use while maintaining compatibility with the listed laptop models.