Charge up to two devices at once using the Power Boost 10,000mAh Portable Battery Pack in black from mophie. Made for travel, the portable design packs enough power for phones, tablets, and other devices you might take on the go. Charge the Power Boost using the USB-C port, then use either the USB-C port, USB-A port, or both to charge external devices. This bank holds up to 2.3 phone charges, tested on an iPhone 12. The LED power indicator allows you to monitor remaining battery life.