The 20k BoostChargePower Bank With two USB-A ports and one USB-C port, you can simultaneously charge up to three devices. For added convenience, the USB-C to USB-A cable charges devices right out of the box and recharges the power bank more quickly via USB-C. Compatible with iPhone models 14–13–12. Versatile 20,000mAh Power With our 20,000mAh power bank, you can extend the battery life of your tablet by up to 28 hours* and your smartphone by up to 77 hours*. Without plugging into a wall outlet, you can stay charged for days while traveling for work or pleasure. You are prepared to charge a range of mobile devices thanks to the two USB-A ports. Charge two gadgets simultaneously. Our power bank provides 12W of power and has two USB-A ports.