Fly carefully battery error message ???

[singapore_phantom]

I received this popup today, barely a few minutes into my flight, while about 10 meters away and 3 meters up. It popped in and out of my screen twice, in quick succession, whilst landing my copter to replace the battery with my spare. I didn't see the popup after replacing the battery, so it must be an issue with that first battery.

Neither batteries have had more than 30 cycles and when I did a review of the cells in Assistant, both batteries checked out, no worries.

My copter is from post-March (got it in September) and has the new pins. So getting this alert is a bit unnerving to say the least.

I wonder if anyone else has had this alert.

I'll next reproduce the alert on my Phantom whilst it's anchored.

 

[ehcropydoc]

I have the exact same issue. I THINK it could have something to do with the fact that I rarely have ever drained my batteries. So I just went ahead and drained all 4 to less than 5% and will charge up and try to see if that solves the problem.