Based on this product's specifications, here are some alternatives and similar models
Battery HUAWEI for P8 Li‑Ion 2680 mAh Original HB3447A9EBW
Summary description:
Original HUAWEI replacement battery for the P8 smartphone, model HB3447A9EBW. Li‑Ion chemistry with a rated capacity of 2680 mAh designed to restore device runtime and ensure reliable power delivery. Intended for use as a direct OEM spare to replace worn or failing batteries. Useful for everyday phone use, calls, browsing and apps; installation requires basic disassembly.