When you plug in a compatible device, the Aukey 20000 mAh USB-C & Lightning Power Bank will quick charge it. Using a USB power delivery port, this external power bank fast charges compatible devices. The Quick Charge 3.0 port can even charge your phone or other devices up to four times faster. So when you’re crunched for time, this Aukey charger ensures you don’t run out of battery. With a total power output of 18 watts, it has a battery capacity of 20,000 mAh. This allows it to charge most smartphones a total of five or six times. And if you have any devices that use low-current charging, this large power bank can manage those, too. Compact in size but big inside, this power bank is ideal for those on the go.