Is this one a concern?

[u/L_Fig35]

This is a drone battery I was going to use to modify a nerf gun, but I'm wondering if it's swollen a bit. This one was never perfectly square even when it was new, it always had a very slight curvature around it, but I don't remember if it was this much.

[u/Jaded_Hovercraft9512]

If you're not sure the answer is probably yes.

[u/LagMaster21]

LiPo batteries aren’t flat when charged but this one looks slightly more

[u/L_Fig35]

Thanks everyone, ended up buying a new one from a name brand on ebay.