Great battery. looks nice and does not smell. Could his feature Ask unfortunately not test, so only 4 stars. And I write this review only because my Bro Marcel would not buy anything from Amazon, which has no vote. The 5 star (or even 0) there after I was able to test the battery.
Update: discharge rate of the battery is high enough for the Phantom permanently to fly under load. Battery fits just as in the Phantom FC40. Have unfortunately no direct comparison of flight time over the standard battery.