Please try to turn on the duraspeed and background task clear.
You try to promontory the whole topic, or the very first my post ..
tips like: "make a reset or whatever you set up correctly" does not work here ..! you need to solve this problem at its program level .. I repeat, read the very first post in this thread
people are already tired of resetting the settings, jumping from one firmware to another,
even the sim cards were pulled, the flight mode was turned on but the phone does not go to sleep! how even more verbatim you explain the problem?
I have bv8000 on the P20 processor and there is no such problem at all, my friend has a phone bv8000 on the P25 processor and nothing helps, even with the flight mode the phone is discharged 10-15% per night and this is not normal.
Someone in the topic 4pda wrote that the phone even in the off state is discharged very quickly and completely all have similar problems on the P25 processor