with Iphone 4 is near saturation point

a really good product. Nevertheless, I have allowed myself to deduct a point because it is not 100% perfect. Although it also should bring 1A as a car charger for the iPhone 4, it creates the device is not, a 40% battery pack (gum per fully charged case) easily invite. "Accessory is not supported," says the iphone then. It helped the cell phone off. Here then shone on the Apple what It normally happens only when booting. Not particularly bad, because the battery is quickly charged to over 60%. From there, the Gum Pro could also again be switched Iphone buffer / load in operation.

I like the compact extent and the common connections: charging port USB-A and USB mini charging input. So I can even use the TomTom Car charger (2A), to charge the battery in the car again.

In the point deduction puts in there too, that the multi-color LED for the read charge status bad: it is never 100 green. You look a little sideways on it, it is more red or orange. Only when you look at it vertically, it is "fully loaded" with state majority green.