Hi my Acer Aspire E15 laptop shuts down randomly even though I have sufficient battery charge. Then why I try to click the power button it says critical battery. But when I plug it, it works fine. Do I have a problem with my battery or did I damage my hardware. I brought it to the Acer store and the guy there said that it might be because I use a universal charger with 19V 4.74A and my laptop is 19V 3.42A. But as far as I know, it's okay to use a charger higher current right? But is there a way that this will damage my PC? So the guy from Acer reformatted my laptop a while ago and then now it still shuts down randomly while I'm typing or doing something which is really frustrating. Please help me identify what's wrong with my laptop. Thank you!