Had my 18350 spare sitting in my change compartment in my car surrounded by change, and my hand was above it when i felt heat coming up from the change tray. I reached down to feel the change/ battery and it had to be 1000 degrees, burning the skin on my finger tip. As I threw my battery to the side in a panic, I realized the battery was trippin. I looked at the battery on my passenger side floor about 20 mins later, and decided to give it another shot. It was still almost unbearable, but i managed to move it to my centre console where i let it sit for another hour. Later, I inspected to see the casing shrunk and split all the way to just covering 1/3 of the battery, and the black plastic at the top was all shrunk n damaged.
Don't store your battery with change... cause that's what I'm blaming this on.
Don't store your battery with change... cause that's what I'm blaming this on.