Laptop shutting down

Oct 22, 2018
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Hi, my laptop keeps on shutting down all of a sudden when i use it, especially when i run high power games such as league of legends. I think it might be my charger which is 90w supplying too little power for my 120w laptop but i am not too sure. I am asking this so i can figure out the main problem and have it fixed right away.
 
Oct 22, 2018
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Update: i don’t think it’s because of overheating as it also shuts down when i just turn on the laptop and when it shuts down, the battery light which shows orange (charging) turns green and it just immediately shuts down
 
Oct 22, 2018
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Yes, i think it might also be my battery because whenever i charge the laptop, it is always at 0% but i can still run the laptop and when i unplug the charger, the laptop also shuts down.