Based on this product's specifications, here are some alternatives and similar models
Battery for HUAWEI P Smart Z SM150595 by extra digital, 4000mAh Lithium‑ion
Summary description:
Replacement lithium‑ion battery compatible with HUAWEI P Smart Z (model SM150595) by extra digital. Rated capacity 4000mAh for extended use, designed for device power restoration and reliable daily operation. Suitable for users needing battery replacement to recover runtime, improve standby time and support typical smartphone tasks such as calls, apps and multimedia.