I've replaced my damaged battery with a new one in my Samsung Galaxy Note 2, but it drains too quickly.
After fully charging the battery, when I leave the phone without using it (the screen is totally off & no apps running background), the battery level gradually reduces to 87% with in 20 to 30 minutes.
Below 87% to 36%, the battery performance is petty good, but when it is below 36%, the battery drains too fast. It falls to 0% within 5 to 10 minutes, and if I play any game when battery level is around 30%, it shuts down without informing me the battery low information.
I changed the battery twice from the shop that I bought it from, but the same thing occurs.
Why is my phone draining my battery so quickly (and inconsistently)? Is it a battery/software/hardware problem?