Based on this product's specifications, here are some alternatives and similar models
Battery for smartphone extra digital BN44 4000mAh Li‑ion for XIAOMI Redmi 5 Plus / Note 5
Summary description:
Replacement Li‑ion battery extra digital BN44 with 4000mAh capacity designed for XIAOMI Redmi 5 Plus / Note 5. Intended as a spare or replacement power source to restore device runtime, it fits specified models and offers standard rechargeable performance. Use for improving battery life, supporting daily use, calls, browsing and media playback.