Q: iPhone 6s Plus battery drained, been plugged in over night, but won't turn on

Last night the battery of my iPhone 6s plus fully drained and died and once I got home, I plugged it in. I waited an hour and it still didn't turn on so I just went to sleep. I woke up and it still hadn't turned on. The little picture showing a low battery and to plug it in isn't even showing up anymore. Nothing is showing. I don't know if it's the charger or if it's the screen. I plugged in my old iPhone 5s on the same charger (mind that the phone hasn't been charged in about 2 weeks) and it still charged and turned on. I cracked my screen on the 6s plus and got it fixed/replaced almost a month ago at the apple store, so could it be the screen? I've only had this phone for 7 months so I'm a little irritated and upset. Please help