So, this was a while back, but just had a question. I had a dispute buying a touring car with a lipo in it. It was very puffed when I recieved it and in pictures it looked fine. I belive they were old pictures because there was a sticker on the picture online but when I got it the sticker was gone. I am unsure of that though. When I said that to him, this was his response:
Him:
its only the case. i have more like it that run fine. heat gets trapped inside and puffs the case
Me:
I also checked the voltage and it is pretty high, like 8.3, which is not a very safe voltage to send it out. That is probably why it puffed because of being on full charge for a while
Him:
Physics 101 8th grade. what happens to air when you heat it. it expands. any mositure trapped in during assembly process will also expand. this will puff the plastic case only until the hot air finds a way out. push on the case in middle u can even feel the big gap now there. if the lipo was puffed it would be solid. cant explain it any better at a low level of knowledge .
Does this make sense? Because I decided to agree with him, and the first run out I pulled it out of the case and the lipo had popped the case open. I then disposed of it. It was definitley a hard puff, no air inside there.