New P4A.  Flying well with new FW so far.   Today i had two of three batteries tell me (at startup) they were incompatible or something and that I needed to slide the bar to update.  I did, and it took about 3 minutes per battery.   No issues.   Anyone know what gives?  Just trying to figure out what to expect next FW update........Thanks again!

BTW, the batteries were updated during the FW update.

Incompatible firmware message will pop up when different firmware are detected  between the battery and aircraft. It is a normal phenomenon when you have more than one batteries. No worries.

DJI Susan Posted at 2017-8-21 19:20
Incompatible firmware message will pop up when different firmware are detected  between the battery and aircraft. It is a normal phenomenon when you have more than one batteries. No worries.

Thanks Susan!  Good to hear.