A panel this size wont charge that quickly but it all helps and thats why its so good even if you can just trickle a bit of charge into phone when its dead or when the battery pack is dead its still does the jobthe added bonus of this charger is that it has an led torch at one end with 2 bright leds and also a cigarette lighter which is a heater padmatrix very usefulso if your phone is dead you can charge it and have a ciggy at the same tim