I fly the DJI3 Professional and the Advanced model, can I use the same battery for both aircraft?  

If you have flown both models with the same battery did you leave the Firmware update v1.3.20 in both aircraft to update the battery as it is used in each aircraft.

Thanks.

Fine to use the same battery for both..

I leave a copy of the firmware on the micro SD card. Once the battery receives it's first update, you should be good to go.

Thanks Greg.  Just received an Email from Dave at dronesmadeeasy and he advised that same.

Flew this morning with a combination of Professional and Advanced batteries.  All flights were excellent and batteries performed as advertised.   

You can also use the same battery if you are flying the Phantom3 standard.