Xiaomi Mi is one of the best brands when it comes to powerband. Its dual USB output will enable you to charge two devices simultaneously. And you can hold this power bank firmly, in your hand, and it's extremely light in weight, you can take it anywhere effortlessly. And its strong 20000mAh, battery capacity will charge your smartphone at least 4 times in a single charge. and its 18 W power out, will allow you to charge your smartphone fast and securely. And in this power bank, you will get 9 Level Protection as well, which will prevent you from short-circuit, over-current, over-voltage, and over-charge. therefore, Xiaomi Mi is one of the best brands when it comes to powerband.