Belkin BoostCharge Power Bank 10K comes equipped with a 10, 000 mAh battery to give up to 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.