Chosen Solution
I just replaced battery with fixit replacement for my iPhone 6, screen powers up beautifully but phone is not charging!!
Try your old battery too to check the charging circuit is still fully functional. If the old one still charges, try again the new one to be on the safe side, if still dead ask for replacement. If the the old one doesn’t charge either, the problem might not be the battery but the iPhone charging circuit or the charging dock.
