Now this may be coincidence or just nonsense and I'm sure that someone can confirm either way with technical reasoning but here's my question. Could a highly protective case affect the battery life of my iPhone 6? The reason I ask is that as of yesterday I ditched my Griffin Survivor case on my iPhone 6 and opted for a thinner, much more lightweight cover clear cover. I used my 6 on the train as I always do, so it gets about 30 minutes of me on Facebook, texting, WhatsApp, news etc. Usually this would bring my old iPhone 5 down to about 75% battery life and I found the 6 went down to about 85% so an improvement I was happy enough with. Well this morning, since it is Survivor-less the battery had only dropped 4-5%. This may be coincidental and like I say someone will no doubt be able to confirm technically but I wondered if the Survivor case affected the temperature of the phone which in turn caused the battery to drain quicker?