Smallest Ultra Slim Credit Card Powerbank with Micro USB built-in for Samsung/Android Phones (real 1400mAh) 

92mm x 58mm x 4.8mm

Features:

Stylish Metallic colour surface (Matt) - Gold, Silver, Blue, Pink

1400 mAh capacity 

Able to fit into a regular guy's wallet

Built-in micro USB cable for easy charging (no additional cable required for phones with micro USB charging point)

Package including:
1 * Ultra Slim Powerbank
1 * charging cable for charging the powerbank