My latop (Acer M5 581-TG) is completely shutting off when on battery, sometimes before it can even attempt to boot, sometimes after 10 minutes of logging into windows. Everything is fine if it is plugged into a power source. There is no way for the button being pressed or the lid closing to initiate a shut down, let alone an instant shut-off. When my computer is plugged in this problem is non-existent.
So it appears to be a battery problem? Can I be sure of that? I am unable to touch or remove the battery due to the "ultra slim" build of the laptop. There is no exposed battery to see outside; the battery is inside and I am unable to open that without a lot of difficulty/special tools.
I have used the laptop for 7 months, mostly charged. I bought it in Bangkok and used it there and around Thailand. Sometimes without a surge protector.