Iphone 5s died and will not charge at all. Any suggestions?

I plugged my iphone 5s into my laptop to charge it the other day once it was charged I used it all day by the time I got home it was completely dead and I plug it back up to the laptop and it doesn't charge so i buy a new usb charger still doest charge through computer but I get the message somewhere along the lines of " this accessory or cable may not be supported" so I plugged into the wall charger STILL NOTHING. But every other time I've bought this lightning cable its worked fine. I've tried to do a soft reset by holding home/sleep button 30 secs but it won't even do that all it get is a battery symbol blinking red with the lightning bolt symbol under it. I've done looked at the connector cleaned it out, no lint, dirt, etc.Am I missing something here?

Replace the battery.

I would say bad chord but if you already tried that then I would just take it to an apple store and have them put a new battery in, and it would be like a new phone again. I don't know anyone that has had a 5S battery go out though.

Try messing around with the box. I've had this happen 3 times where i would have to try someone elses box in different wall ports and out of no where it works.