1520 is draining my battery and says phone usage is 90%-100%

[kygal425]

In the last couple of weeks my phone has been doing strange things. I have had the phone since Nov,2013 and been very happy with up until the last few weeks. For some reason, when I get up in the morning, on the battery saver, usage it states that my phone usage is 90-100% and that is after being at rest all night either on the charger or not in use. Anyone else having this problem. Went to the ATT store and the gal there suggested I might need a battery and when I said ok and asked if they could install one, she said oh I forgot, you can't open those! RIght now my battery saver, usage is at 100%, Messaging 3.2%, Facebook 2.4% and my Lumia Camera at 5.3%. Does anyone else have this problem? Or can you tell me what pulls the phone usage?
Thank you!!

 

[Geddeeee]

You have a rogue 'stuck' app, or e-mail is continually syncing.... Hard reset and start again.. Just to be sure!!!

 

[Sunil kumar Teki]

Uninstall some third party apps which were installed recently.and try.aame problem was happening to me. After uninstalling.it worked