Computer Shutting Down at ~50% Battery

Question

My laptop is unexpectedly turning off when it reaches about around 50% battery, but the actual level can be anywhere between 40% and 60%. It never turns off when plugged in. Whenever it does shut off, I have to plug it in before it turns back on. I thought maybe something was wrong with the way the laptop was reading the battery, so I updated the BIOS. Right after updating, the computer reached 20% without turning off so I thought the problem was fixed. But the next time I used it, it shut down at 40% again.

I know its not a heat issue because it happens whenever the laptop isn't plugged in. I thought maybe my laptop is reading the battery wrong but I don't know how to fix it. I've already completely reinstalled Windows.

Answer 1

Try checking Battery Report,

-> Open cmd in Administrator mode

-> Enter 'powercfg/batteryreport'

-> Go to saved location 'C:\Windows\system32\battery-report.html' & open it.

-> Check Installed Battery 'DESIGN CAPACITY' & 'FULL CHARGE CAPACITY'.

Installed Battery Info

It shows the actual Capacity of battery and current charging capacity. If there is big difference than try changing your battery. There might issue of Battery.

Answer 2

Nine battery cells…. in a triangle pile. If some of them were bad or defective, the battery might SHOW full charge, or show even a partial charge, but it won’t be accurate. As soon as you really just drain the good cells, the unit turns off.