HTC ONE M8 Battery is taking 9+ hours to charge

[AC Question]

Hey guys, I'm a bit new to this forum, excuse me if I've made any mistakes.
So basically I bought a almost new used HTC ONE M8 this afternoon. I came home at about 10 PM and it's battery was dead. I plugged it on charging, let it charge and then looked at it for an approximation after about an hour. It stated 16% and Said 9 hours 'till full charge. I'm really shocked to hear this. It has the android Marshmallow upgrade.

 

[Sim Sim Salabim]

I would say the battery is defective