The 20000mAh capacity ensures that the Zebronics MW52 can charge devices multiple times before needing to be recharged it self. This large capacity is ideal for extended trips, outdoor activities, or for people who need to keep their devices powered throughout the day. With a maximum output of 22.5W, the MW52 supports Fast Charge technology, allowing for faster charging compared to traditional power banks. This means that your smartphones, tablets, and other USB powered devices can be charged quickly, saving you time when you need power most.