Hi guy’s, I am using a power bank of redmi brand. It I very useful to me for emergency charging. I also bring this when travel. It is easy to carry in pocket becouse it has small in size, Power has 5200mAh. I can charge 2 batteries when it will fully charged. It has power button to switch on and off. And indicated led lights has for charge indicate. It has a charging slot and single USB cable slot for charge smartphone and other devices.