Seems like the 30c packs get warmer than others. I ran a 4500 30c fp pack in my lst and it would push 135 at times in the summer. Never puffed and it gives full capacity. I also noticed that this pack would not perform cold, needed to be at least 80f to do anything. Weird. 108 is fine, I do not worry till I get over 120 on a lipo.