So this happened without warning. I turned the laptop on and left it plugged in for a couple of hours. When I came back it was already turned off so I powered it back on and noticed that the battery sign says that it's at 0% available (plugged in, charging) but the laptop isn't actually charging. The moment I take off the charger my laptop turns off. I checked the Acer Care Center software and it says that my battery health is good. Finally, batteryreport says that the battery's full charge capacity is at 70,200mWh against the design capacity's 90,000mWh.