My Power Bank set... :D:D:D
2200 mAh black, gift with car oil change, 2200 mAh blue, paid from chinese shop 5 Euro, XiaoMI 10400 mAh ( less than 20 US dollars), 2A Output, 94% conversion efficiency rate, but you can charge Power Bank AND a Phone or other things connected to Usb, WHILE still...