No They will not work a P2 battery is 11.1 Vdc and a P3Pro 15.2 Vdc
also I believe that the software in the P3P wil not even allow the battery to connect if it senses the wrong battery.
Sorry
Waylander
you might be able to swap the smart circuit board swapping lipos between the two involve cutting and swapping also the battery connector with their own data contact point. but I don't expect any "dji owners" to be so bold