Got power bank 2 months ago. its a life saver for me actually.Due to job work need to be outdoor most of the times and traveling for need battery backup daily. Using it on daily basis. There is no trouble given yet. As I am using mi phone by which it gets charged faster. It's like a heart for my mobile. Many emergency situations I been saved becasue of it. Multiple usb plugs been helpful for using other phones. Or using hot plugable lights in darker places. Suggest everyone to buy MI. Mi fan always.