Are there any Phantom3 accessories that are compatible with the Phantom4?
Specifically the:
Phantom3 charger
Phantom3 charging hub
Phantom3 hard shell backpack
HDMI Output module for Phantom3 remote control

Thx.

Also will ND filters purchased for the P3 fit the P4 as well?

I highly doubt it.  I think the ND filters will work... but battery charger nope, charging hub probably not, hardshell prob not the 4 looks a tad bit different in size. Prob just the filters.

No all accessoriers are not compatible with Phantom 4. Only ND filters will fit in new P4
Charger for p4 have different connection. HDMI Output module u have to wait for Firmware update.

I believe that P3 hardshell can be ''adjusted'' to the shape of  Phantom 4

One of the DJI people wrote elsewhere the HDMI Module would work, but don't take my recollection as official.  Nothing battery-related will work for certain.

Is there a charging hub accessory for the P4?

The battery connection it totally different and P3 charger will not work.
I put the P4 in into the hard shell back pack and because the landing gear is close to an inch longer (front to back) it will not fit into the back pack unless you cut out some of the foam. But then you have the battery fit problem as well.
And the HDMI module will fit after a firmware upgrade.

kperison@outloo Posted at 2016-3-4 01:56
Also will ND filters purchased for the P3 fit the P4 as well?

Yes, the P3 lens cover is the same size as the P4. My Polar Pro P3 filters are an exact fir on the P4.

Bemx2k Posted at 2016-3-4 02:27
I believe that P3 hardshell can be ''adjusted'' to the shape of  Phantom 4

Yes you can, you would also need to remove a bunch of material to fit the battery in the battery slot.

kperison@outloo Posted at 2016-3-4 02:55
Is there a charging hub accessory for the P4?

Not as of now, but since the P3 and Inspire have a hub, there may be a P4 hub down the road BUT, that's just my opinion.

Where can i order Phantom 4 batteries ??

DJI website

chanrz Posted at 2016-3-3 20:43
DJI website

Cheers . Apart from there. Can you order them from the Apple store ? can't see anything on there site, i ordered my P4 from Apple store UK

The HDMI module may work, but neither the charger or charger hub will work because of the plug which instead of two flat connectors not has multiple pins at the BOTTOM of it. Case will not fit either because Phantom 4 is both thicker and the motors seem to stick out above the arm now.

Ok.
Basically, sell everything we've got, except for the filters. Got it.
Thanks all.

Anyone need a complete Phantom 3 Professional package with:
P3 Professional craft & Controller
4 Batteries
4  Sets Regular props / 2 sets Carbon props
Charger
Charging hub
Hard Shell Backpack
Smartphone Shade Hood
Original packaging, SD Card, cables, stickers
Spare replacement air frame shell (new)

These parts new from the DJI store are $2645 Cdn ($1972 US)
I am selling them for $2100 Cdn

I bought the bird June/15.  I've only flown it enough to charge each battery about 8-10 times.
If you are interested I will be selling it through ebay.ca . Posting will live sometime this week.