iPhone 6 Battery Draining while phone is off.
Hello, I am having an issue with my iPhone 6 Battery and am looking for some help. After replacing the battery and the charging port my battery appears to be draining while the phone is turned off. I will go to sleep with battery at 100% and turned off (holding the power button and sliding my finger across to turn it off not just standby) and I will wake up in the morning and the phone will not turn on and will require charging again. Anyone have this problem before or a similar problem?