Why ceba® power bank? We hate to see "battery low indicators". Let’s solve it together. Why "world thinnest battery" 1- it is just 3.9mm but it is powerful also. 5000mah capacity will charge your iphone 5s 3 times. 2- "smart usb design" will change your tradition using way. 3- you can bring it everywhere, even can put on your jacket or jean pocket. (just 64mm³) less than 190g in weight... 4- smart, strong, convenient, fashionable and "thin" design.