iphone 6 battery charging
My iphone battery has been going from 27% - 19% I have a iphone 6 I've changed the settings put on low power mode and changed the brightness my iphone turned off at 4% and wouldn't turn on the battery symbol showed then it was able to turn itself back on what can i do? I don't have apple care I just got my iphone brand new back in March I dropped the phone once if anyone can help me that would be appreciated!
iPhone 6, iOS 9.3.3