Hey, I have a question, how is it with the batteries for the mavic air 2?  I have 3 batteries and I noticed that when I put the sticker down on the table, it starts to rock a little, but it's really a bit.  The 2 remaining hands are kind of "full" but do not sway.  How does it look like?  Batteries have 12,18,21 cycles.
Initially, I learned that this is not the first such case.

Do I have to send such batteries back for warranty?

https://youtu.be/FPnSlwZCtpI

Hello there. I am sorry for the trouble this has caused and thank you for reaching out. Battery swelling is basically caused by to much heat, vast changes in temperature and/or moisture getting into the battery itself. The lifespan and condition of the battery will depend on the totality of how it was used and stored. Hoping for your kind understanding that every electronic product and batteries has a certain warranty period and lifespan. For safety purposes please do not use bloated or bulging batteries when flying or operating your drone so that the drone's performance will not be affected or compromised . Using bloated or bulging batteries might lead to damaging of the aircraft, or worse, damage to property. For additional reference I will post a list of the DJI Mavic Air 2 intelligent flight battery safety guidelines. Again, I am sorry and thank you for understanding.

When I received my MA2 combo I did a flatness test and had 1 of the 3 batteries that appeared to rock a little compared to the other 2.  Over the last 8 months it has not gotten worse with the rocking bit or bloated so I think it was a manufacturing default on the battery's case.  

Gonna keep my eye out for that.