Hi Im sorry to hear that.
A lot of things can cause this to happen.
If you have certain apps running the will drain your battery quickly, is ts best to shut off the apps you aren't using all the time and only turn them on when you actually need them.
Also using the phone for calls, or when the screen is on this will happens.
If none of this is the case please let me know, so I can go over a few other things.
And how old is your phone?
In any case, I will stick with you until this is complete.Please rate my service kindly.Also it is the only way I am credited for my time and expertise with you.Once you rate, I will be notified and will add your question to my priority list so you can reach me anytime until this problem is solved.Then you can reach me by simply replying to this message anytime.Thank youSincerelyTech Michael