Power Bank 10K comes with a 10,000 mAh battery to give an additional 36 hours of battery life to your smartphone. Text, chat, and watch videos without worrying about losing your charge as you power devices from one USB-C or two USB-A ports. A 6 in./15cm USB-A to USB-C cable is included, so you can start charging right out of the box. Max. additional video playback hours calculated by comparing the mAh capacity of this power bank with the max. video playback hours achievable by the iPhone 8 or iPad (5th generation). Actual additional hours provided may vary based on factors that are different for every user.