Based on this product's specifications, here are some alternatives and similar models
Battery Riff for Huawei Mate20X HB3973A5ECW Li‑Ion 4900 mAh
Summary description:
Riff replacement battery compatible with Huawei Mate20X, model HB3973A5ECW. Li‑Ion chemistry with 4900 mAh capacity. Designed as a direct swap for the original cell to restore device runtime, support regular charging and provide stable power for daily use, gaming and multimedia. Follow manufacturer guidelines for installation and disposal.