why is my phone LG G3 DYING AT between 40 % - 30 %

[khald zeroa]

i have an Lg G3 and i have this problem from long time my battery dies at 30 % most

with really fast draining from 50 to 30 %

i have tried this
- upgrade to marshmallow
- hard reset
- soft reset
- battery calibration ( no root and root )
- change the battery ( i think its low quallity but i just dont know )

PLS HELP !! I TRIED to contact lg website but do u know what they say to me : sorry we dont sell lg phones on that contry

Plz help guys is there any real solution ??

 

[B. Diddy]

Welcome to Android Central! By battery calibration, do you mean that you charged up to 100%, used it until it shut down automatically from low battery, then charged back up to 100% again?

Did you only try one other battery? If you suspect it was low quality, then see if you can find a genuine OEM battery.

 

[me75006]

There can be a big difference between a cheap battery ($7.50)
and
a higher quality name brand battery ($25 to $45)
been there and did the experiment by buying both. A new cheap battery drained sooner.