Galaxy Note 4 Battery Case, is fantastic as a short road trip battery. It's bigger than I want to carry when flying but is perfect for charging. Right now Rasse has their Galaxy Note 4 Battery Case, Rasse® Ultra Slim 5200mAh Rechargeable Protective External Battery Charger Case Juice Pack Power Bank Power Reserve Powerstation Backup Battery For Samsung Galaxy Note 4 with Kickstand Retail Packaging (Black) for cheap price. You'll just need to visit the site.
Specifications: Capacity:5200mAh(19.24Wh) Input Voltage:DC 5V Inuput Current:0.8A Output Voltage: DC 5V Output Current:1.2A Max Charging Time:7hours Operation temperature:0-45 Degree Cell Type:Polymer Lithium Battery Package contents: juice pack, User Manual