Battery: 2PCS 18650Li-ion Input: : 5V -1A Output 1: 5V-1A / 2: 5V-2.1A Conversion rate: 85% Life circle: 500 Working temperature: 10º C-60º C Full charge time: 8-10Hours: 8-10Hours: 8-10Hours Dimensions: (LxWxH) 99mmx52mmx20mm Net weight: 180g Material: Alloy Packaging&Acces: Optionalionalional 4000mAh--5200mAh power bank CE FCC RoSH MSDS Approveled OEM logo branding Sample's fee can be refund after mash order 12months warranty T/T, Western Union, etc. Delivery can be Express UPS, FedEx, Air Freight cargo, Sea shipment. Feedback If there is any problem, just contact us freely, we will do our best to provide the best Service! Your Satisfaction is very important in our business success. Thanks for the chance to grow and develop with you!