Rosewill Powerbank 13000mAh External Backup Battery Charger - Retail Packaging - Black Capacity: 13000 mAh Micro-USB Input: 5V Samsung Lithium Ion Battery Cells 2 USB Port to charge up to 2 device at the same time Recharge this battery with your USB charger, or PC/Laptop USB port Capacity: 13000 mAh ^Micro-USB Input: 5V ^Samsung Lithium Ion Battery Cells ^2 USB Port to charge up to 2 device at the same time ^Recharge this battery with your USB charger, or PC/Laptop USB port