LANKOO Smartoools card power bank slim credit card size portable external battery charger for iPhone Samsung Galaxy Huawei Nexus cell phones Unique: beautiful fashion design and 3D printing process Matte Suface: Coated Rubber Oil and touched as skin feeling Capacity: high quality 5000mAh rechargeable lithium polymer battery Safty: 4 layers PCBA to protect against short-circuit and high temperature Quick Charge: 4-LED power indicators and automatic charge, 5V 2A input and output