Laptop randomly going in hibernate

I have an Asus ROG G751JT laptop, and a few days ago my battery has died. The problem that I am encountering is that my laptop randomly goes to sleep after a few minutes of use even when plugged in. I have formated both my SSD (that I have my OS on ) and my other HDD and the problem persists. The intersting thing is that when I reinstall the OS ( Windows 10 ) the laptop is working fine untill I unplug it , after I unplug it the hibeate thing starts happening. I have tried tuing hibeate completely off but if I do that the laptop just shuts down instead of hibeating. I will replace the battery but in the meantime is there anything that I can do so I don't have to install the OS a few times a day?