Hi all, this is what's happening:  Bought my P4P+ last year, upgraded in January to firmware 01.02.0304 without problems.
Now that 01.03.0418 came out, I upgraded the firmware, and it seemed to go without problems, except my intelligent battery (the one that came withe P4P) stopped working altogether, with a "Battery signal error" and also (depending on where in the admin section you look) "Battery authentication failed".  I can power on the drone, but I cannot take off with this battery.

I did update my remote (the plus version) to the 01.01.03.00 version.

I have read up on the forums, and I've tried refreshing the firmware on the drone with the bad battery inserted, I've tried upgrading with DJI Assiatnt 2, and also with the remote. I've tried downgrading the firmware and then re-upgrading it (with the bad battery in it).  All of this to no avail.

Also I should note that I get the "Battery signal error" even if I go back to the 01.02.0304 version, with which the bad battery used to work well.

The other batteries I have are the ones for the P4, and those work well.

Does anyone have any idea of what I can try now? Failing that, what's the best way to contact DJI support for this?  I really hate the hassle of dealing with sending stuff back for repair, so I'm hoping I missed maybe a way to force-update the battery firmware...

Thanks, all!

This may or may not work but have you tried updating it with the sd card out?

Would you please help us confirm the battery SN?
And post a screenshot for the error here, thanks.

Mobilcams Posted at 2017-3-19 18:52
This may or may not work but have you tried updating it with the sd card out?

Worth a try, but no luck... Thanks, though!

DJI Natalia Posted at 2017-3-19 19:49
Would you please help us confirm the battery SN?
And post a screenshot for the error here, thanks.

Thanks, here is the SN: ODQADA703106TM

I attach pictures of the screen, sorry, did not have time to figure out how to take proper screen shots on the remote itself.
Thanks!

gabriel.magana Posted at 2017-3-20 08:00
Worth a try, but no luck... Thanks, though!

Dang that sucks sorry.. :/

gabriel.magana Posted at 2017-3-20 08:05
Thanks, here is the SN: ODQADA703106TM

I attach pictures of the screen, sorry, did not have time to figure out how to take proper screen shots on the remote itself.

Thank you, I've reported this case to our engineers.

DJI Natalia Posted at 2017-3-21 01:21
Thank you, I've reported this case to our engineers.

Thanks Natalia, really appreciate it. What's next on this?  Should I expect an email, or what will happen next?

gabriel.magana Posted at 2017-3-21 10:37
Thanks Natalia, really appreciate it. What's next on this?  Should I expect an email, or what will happen next?

Just confirmed with our engineers, please send it in to our service center, we'll help you take care of it.
You can submit a case number and apply for pickup here: https://repair.dji.com/en/SelfRepair/Area

DJI Natalia Posted at 2017-3-22 01:15
Just confirmed with our engineers, please send it in to our service center, we'll help you take care of it.
You can submit a case number and apply for pickup here: https://repair.dji.com/en/SelfRepair/Area

Thank you , the case number assigned was CAS-525284-V5X2N9

gabriel.magana Posted at 2017-3-22 12:46
Thank you , the case number assigned was CAS-525284-V5X2N9

You will be receiving a shipping label soon to help with the shipping cost. You'll be up and running again in no time.