Samsung Galaxy S7 Battery draining super fast.

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Android Central Question

I have owned my S7 for about exactly a year now and overall it's been a pretty good experience until recently the battery life performance started to decrease dramatically. I was so impressed on how long my battery life was, but now I can barely get by 4-5 hours without charging. I used to be able to last a whole day before with the same amount of usage. I unplug my phone at around 7:30 AM. I then take the bus to school and arrive at around 8:05. At that point, my battery is already at like 70-80%. When the only thing I have been doing is listening to music and replying to some snapchats. I then leave my phone alone until around 9:15 AM. At that point, my phone is around 60-65%. I then listen to some music as I walk to class. I then leave my phone alone for around another hour and use it again at around 10:10AM. At this point, I am already at around 50-60%. I normally use my phone threw out the next hour and by around 11:00AM my phone is already on 20-35%. I then charge up my phone for an hour all the way back to 100%. I then continue to casually use my phone threw out the next few hours until around 3:00 PM and my phone is around 50%. When I get home I end up charging my phone to use during the evening. But at around 7:00 PM, I am finding myself charging for a 3rd time in the day.



Does this seem normal for the S7? It was not like this before and like I said, I use to be able to get threw the whole day without charging it at all.



I'll add some screenshots of my battery usage below.



Thanks for any help in advance!