Origin: Guangdong, China (Mainland) Brand Name: OEM Model Number: JY-937 Dimension: 35*21.5*20cm Weight: 100g Capacity: 4000mAh Outport: 5V 1A Input: 5V 1A Socket Type: USB interface Color: Blue, Green, Pink, Grey Port: Single port Battery Cells: 18650 Lithium-ion Charge Time: 5-6Hours Operating temperature: -10-40°C Cycle life: Over 600 times Accessory: 4+1 charging Cable Market: USA/EUR/S.E.Asian