Battery issues xperia C3

[Shr1]

My brand new Xperia c3 had a estimated battery life of 5days but after using it for 2-3 days the estimated battery life is 1day and normal battery use with stamina is 13hours only.  Why is this?  And I'm running the latest update 5.1.1

[AutumChris · Accepted solution]

It happens when your phone is left overcharged so the readings are a bit off. Go into apps>all>Stamina/Eco and clear data then restart phone.

[_alexdon_]

You can reset stamina like this: first disable it, then go to settings-apps-all,scroll down to stamina app. Tap on it,force stop and clear data. Restart.