PHANTOM 3 BATTERIES ARE DIFFERENT
So apparently there is one little difference between the Phantom 2 and Phantom 3 (apart from the quality) when you are costing out your changeoverr!
One thing DJI seem to forget to mention in the P3 launch was to throw away all your P2 batteries! They do not share the same batteries if you are thinking of doing the swap! I am yet to see the new one, but believe it to be higher voltage as well.
From DJI The other main difference is the Intelligent Flight Battery charger. The Phantom 3 Advanced comes with a 57-watt charging unit and the Phantom 3 Professional comes with a 100-watt charger, the latter of which allows for shorter charging times.