Power Bank, VINSIC 6000mAh Portable Power Bank, 5V 2.1A External Mobile Battery Charger Pack for iPhone, iPad, iPod, Samsung Devices, Cell Phones, Tablet PCs (Black) Power Bank, made of high quality aluminum alloy with anodized processing, comfortable to the touch. Uses 2 high-quality Samsung 18650 Lithium Ion Battery Cell Inside,6000mAh external mobile battery power bank. Designed with a 5V 2.1A output USB port, universal fits most digital devices. Built-in 4 LED indicators to show the charging status and battery level, safe and reliable. External battery charger, compatible with iPhone, iPad, iPod, Samsung Devices, Cell Phones, Tablet PCs, etc.