Razer Blade Pro 17" Battery Issues

I have had my Razer Blade Pro for a little over 1/2 a year when I bought it from my friend. One day I was playing games with the laptop plugged in but the battery was still not charging. Once it finally died, whenever I try to turn it on and delete the battery drivers (like many guides tell me to do), it will turn off very quickly and make a weird noise. What's even weirder is that the amount of time it takes for the noise to happen and my computer to turn off is dependent on how much time I wait before trying. If I wait for a few hours, I get around 30 seconds but if I only wait a few minutes I barley get 5 seconds. I think it is probably that my battery is fried, as I remember the device being very hot and loud when working hard. I want to replace the battery but i'm not sure how as I don't think I have a warranty on the device. Any advice.

Side Note: The charging brick, which has a little indicator light on it, lights up full green when not plugged into my laptop but blinks green when it is plugged it. Does this mean it only gets charge when the green light shows up while it is blinking? Why does it not blink when it's not plugged in? I have so many questions and the phone line told me to comment here so that is what I am doing. Please help if you can. Thanks!