I use electronic mod,not a mech, i had an experince of my battery being angry about touching with my keys,it went hot and smoking and all that inside a tight jeans pocket in a classroom,not a big deal,took it out and threw on the ground,and threw out of the classroom,i got lucky yes,my pants got damaged and thats it,but im pretty sure batteries blow up on mech mod only,they are designed not to blow up but just to expand in size and their metal cover should help with that.

What i see on a OP picture is just a little scratch,come on guys how this can affect in any way? I understan if that happened on 1 of the postitive/negative side,but this is nothing.