So I went travelling for 6 months.
Mavic Pro batteries and controller were in a box.
The batteries seem to charge OK, but the controller doesn't.
I am using the official charging brick USB port, and official cable.
I also tried othe USB cables and other chargers, same result.
The controller lights up when on charge and says 1% and charging, but no matter how long I leave it it doesn't go beyond 1%.
When I take it off charge it won't switch on.
Any ideas?
Is there a way to connect it to a computer and reset it or something?

PS: I searched the forums and found a couple of similar issues, but no real solutions...

No quick fix here, Sounds like the battery is shot from 6 months of storage, without getting some exercise. You'll have to send it back to DJI for repair.

i agree with Bill B, send it in for repair.

Hi there, sorry for the inconvenience. Please contact our support team to start a ticket and send the remote controller in for a thorough diagnosis. Our team will help to check which parts need to be repaired and will take care of it. Kindly use this link: (http://www.dji.com/support). Thank you for your understanding.

That sucks...  You can't stop using the drone?
I might have to figure out when I bought it, and where, and try and find a receipt...