Based on this product's specifications, here are some alternatives and similar models
Xiaomi BHR9738GL power bank Lithium-Ion (Li-Ion) 20000 mAh White
Summary description:
Xiaomi BHR9738GL. Battery capacity: 20000 mAh, Battery technology: Lithium-Ion (Li-Ion). Battery voltage: 3.7 V. USB Type-A output ports: 1, USB Type-C ports quantity: 2. Total output power: 22.5 W, Output current: 1.67 A. Product colour: White