Why is it taking 9 hours to charge?

[Android Central Question]

Yesterday I did a software update on my Samsung Galaxy s7 after it started to run far too slow. That issue I think was fixed in the update, however, something extremely odd is happening. Not only does my phone lose power when I'm on it while it's charging it is also taking super long to charge. On top of that even with medium power save on the power is draining a lot quicker than I believe it should. The approximate time until my phone at 18% was 9 hours and 40 minutes. I am sure that my phone is supposed to take 90-140 minutes to charge from 0 percent to 100 percent... not 580 minutes.

What is happening? What do I do? I changed my charger, outlet, and the box, it went down to 5 hours that is still quite long and my phone isn't even at zero.

 

[scottbeamer]

Sounds like the battery is dying.

 

[Mooncatt]

Is it only taking a long time to charge? That could be a bad USB cable (a very common problem). If it's draining quickly too, then it is most likely the battery itself going bad.