Based on this product's specifications, here are some alternatives and similar models
Power bank Holdit Smartline 5000mAh Li-poly 2.4A black
Summary description:
Portable power bank Holdit Smartline with 5000mAh Li-poly battery capacity and up to 2.4A output. Compact, single-colour black design for charging smartphones, tablets and small USB devices on the go. Provides emergency power, multiple charge cycles depending on device, and simple USB output for everyday mobile use and travel.