Based on this product's specifications, here are some alternatives and similar models
Power bank SBS Mobile 5000 mAh LiPo, 10 W output, 2.1 A, black
Summary description:
Portable power bank from SBS Mobile with 5000 mAh Lithium Polymer (LiPo) battery, Smart IC fast-charging technology and 3.85 V battery voltage. Provides up to 10 W total output and 2.1 A output current for charging one device at a time. Compact and lightweight (0.1 kg), compatible with universal chargers; suitable for smartphones, small USB gadgets and travel use.