Hello, I have the same problem of power consumption probably related to wifi. My brand new bv7000 pro runs out of battery in roughly 12 hours with regular usage. (no games, no filming, no nothing); furthermore, it seems to become quite warm in the upper back area.
My wireless Update shows BV7000_PRO_Blackview_20170324-210250 and as I search the wireless updates it respondes that my device is up to date.
I have a basic knowledge of android and, since my phone is really new I don't want to mess around with it.
Please give me some simple explanations of what I am supposed to do. If the problem persists I will have to return it to Amazon.