I've got an Acer Nitro 5, AN515-53-52A, and I've been having battery problems. When you're running out of power, you get the notification at the bottom right saying you need to plug in soon. For me, my laptop instantly shuts off. No warning. Nothing. It doesn't go into sleep mode. It just shuts off immediately.
I've had this problem before and solved it by replacing the battery pack. You know the drill, turning my laptop around, unscrewing the back and battery, and then screwing the back again. Problem solved. As I'm going through Amazon and selecting the battery for my laptop, it's asking what size. The last one I got was AC14B8K, so the different sizes matter? Or do I get the AC14B8K? Again, this is for an Acer Nitro 5, AN515-53.
[Edited the thread to add model number to the title]