Why is this iPhone not charging?

Got a customer phone (a friend) and the complaint was first that the screen was cracked. When I went to pick it up the customer said that now it doesn't turn on. I figured it was because of the broken screen. I didn't have the screen in stock so I gave them a loner phone and went on to order a new screen.

At this time I put the phone through a couple charge cycles and then I started hearing an alert noise. When I put the phone on silent the noise stops and it turns to vibrate. I figured there was an alert on the screen but since the screen isn't working I can't see what It is. During this time the iPhone was getting hot. Then I plugged it in a computer and iTunes recognized it and prompted for a password. So I know it's getting power and works with a computer so I ruled out the logic board.

The screen will be here any day now and so I went to charge the phone up again and now it's not doing anything. I've tried two different chargers and it does nothing. I plugged it in the computer and nothing.

One more thing I did was clean out the charging port and it still does the same thing. My best guess is that something is wrong with the battery. But I thought I would ask around before buying a new battery.

What do you think it is? Is there a common fix?

How to fix iPhone 5c that won't charge?

The past couple weeks I've been having problems with my iPhone 5c charger. I would plug my phone into it like normal and nothing to happen. It would charge and this is like my 3rd charger in the past 2 months and I really don't want to buy a new one. Is there a way to fix it. Or the plug in part of it?

What's up with all these little kids with Iphones?

Alright, I see it all the time, 8 year olds with Iphones, I see 7th graders with them who have broken like 4 and continue to make their parents buy them new ones, it's like they're entitled to them? I think you should be at least 16 to have an Iphone and you shouldn't make your parents pay for it.
But why do parents continue to buy them when they know they don't need them and they're going to break it again?

How to get my cracked iPhone 4s screen fixed?

How to get my cracked iPhone 4s screen fixed?

Added (1). I have insurance on my Verizon phone that I pay monthly, But I need my phone and can't send it in. Is there any way I could go to the store and they give me a new phone? Or what should I do?

IPhone freezing on Internet?

I have the iPhone 5c just last night it started freezing up on the Internet I must have had to shut it off about 2 or 3 times to get it to work it's making me mad I wanted an iPhone so bad because I was the only one who didn't have one. I have 156 songs 34 photos no videos. I Facebook messenger Twitter Instagram and Netflix. I was on Facebook last night it froze up about 3 or 4 times and I had to shut my phone off because the app wouldn't close. Same thing here on the safari I had to either refresh it or close the app because when I went to ask a question on here it would freeze. I downloaded the iOS 8 on Thursday but it just started freezing up last night. It's really pissing me off I have great internet connection I have dropped my phone only once that was months ago. I've had it since March. It's my first iPhone. What's wrong with it? Why does it keep freezing up on here or on Facebook? How can I fix it?

Why won't my iphone 5s detect Wi-Fi?

I just received a new iPhone 5s from amazon this weekend.
its my first day having it in school, and i get absolutely NO service. Its always searching. That didn't usually happen with my Galaxy SIII, same carrier.
when i was in the cafeteria, which always has an open Wi-Fi connection, i went to go search for it.
at first i figured the connection just wasn't strong enough, but then i took out my 5th gen iPod touch (since i hadnt put music on the phone yet) and was already connected to the internet. It even showed 2 other available connections, while my iPhone showed none.
what can i do to fix this problem?