Battery drains every time screen is turned on I just bought a new phone, it is Android 4.4.2, but it seems that it has a problem with its battery. Every time I turn on the screen, the battery drops 1%. For example, the battery is 30%. then I close the screen and turn it on again after a minute, and then in few seconds,the battery becomes 29%. It only happens when I turn on the screen, but when im using it, the battery discharge is normal. How can I fix it?
Based on our chat, things which were tried are:


Turning off "proximity sensor" and "Smart Stay" (to rule out malfunctioning causing battery drop h
Checking screen usage from inbuilt battery statistics (seemed to match usage)
Booting into safe mode and observing battery drop
Factory reset to rule out rogue app causing this


OP has confirmed that the Battery drop continues as stated in the question

Being a new phone, it could either be


ROM bug, which can be checked from user forums. If it is a reported bug add if the OEM rolls out a fix then the problem is solved
Defective piece, which being in warranty can be exchanged (Recommended course of action on my opinion)


(Flashing stock again is an option but do not advise it as rooting methods, flashing tools etc may not be readily available being a lesser known phone My25 (myphone). Flashing a custom ROM for the same reason and absence of developer support , is not recommended)