Curious as to whether or not anyone else has intermittent poor battery life with their HTC M8 for Windows phone. My phone on occasion, although it has happening more regularly, will become extremely hot and the battery will drain rapidly. This is happening when the phone is on standby, with no apps open in the background and very few apps allowed to run in the background. I can lose 20% of my battery in an hour to two hours. I have already received a replacement device and turning the data radio off stops the problem. Then if I leave it off for a while the problem goes away once I turn it back on. I am assuming it could be the SIM card as my Nokia Lumia Icon had the exact same settings and it never shows these same problems.