Got 2 new batteries for my m2z

[detectorguy]

When I first got to the park it said I needed to do a vision calibration. But I canceled that as I wanted to try out the new batteries.

I received 2 new batteries today for my m2z and took her to the park. I flew her with one of the older batteries and she did fine, then I put another older battery in her she she appeared to do fine until she landed. Normally she points to the same direction she took off from, but while she came down to land she pointed to all points of the compass as she turned around and around. I canceled the landing and did a hand catch, and checked the battery and it was hot and bulged slightly on the bottom.
I put one of the new batteries in and she did better.
I wonder if a vision calibration will help my bird ?

 

[Scooped]

Mine also said I needed to do a calibration. I did as instructed and did the calibration, and it still says I need to calibrate. Good luck with it as I am stumped with mine.

 

[ATP]

I would suggest you retire that battery, safely.