Chosen Solution
Ok so I have a problem, I have purchased a battery about a month now and I never overcharge it at night and I I my overcharged it ONCE cause my battery was low and I need to go to school fully charged now my battery is eating power in like 2 minutes it drains about 5 percent on sleep
Possible you got an aftermarket battery which is faulty or a fake.
I had similar problem. Try removing the SIM, clean it and then replace. I get a better signal now and also battery discharge rate back to normal.
