Hi, i've bought xiaomi mi 4 wcdma a couple of month ago. The battery life on KitKat stable was good (24 hours with 8 hours of screen on!) but now, i think is a marshmallow problem, the screen time is only 4,5 hours. If the screen is used for 8 hours, the battery does not arrive at 14 hours. I've already done a clean installation. Is this the normal battery with marshmallow, or is only my problem? I've attached two screenshot of battery usage (KitKat vs marshmallow). Thanks in advance