Based on this product's specifications, here are some alternatives and similar models
Battery Origin Storage DELL 51WHR 3 Cell Lithium Ion
Summary description:
The Origin Storage DELL Battery 51WHR features a 3-cell Lithium-Ion design with a capacity of 4100 mAh and 51 Wh. It operates at a voltage of 11.4 V and comes in a sleek black color. This battery is designed for reliable performance and longevity, making it an ideal replacement for your Dell device.