For what its worth, I store my lipos outside. I keep them on aluminum sheet or pavers, and covered, and in a shady spot. Now I can focus on all the phones, computers, and gopro batteries going poof. I'm actually planning on a little building for them.
I got into the habbit of unplugging years...
Last uear I did the same for I think 16 to 24. I kept crawling inbetween work and just forgot. 😂
Swelled and deceased 3s.
If it was me, just replace and be more careful. I had no more then 30 runs, and it was $110 if it makes you feel better. If it was soft, you can see it better.