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baterry shows 100%, yet when I unplug the power cord, it turns off

when i unplug the power cord, my computer turns off, even though the baterry shows 100%

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If the battery/computer…

  • Is more that 2 years old.

Batteries are very tricky. Because you have to think of them as fuel tanks. Batteries have a capacity, and when you charge them you're refilling the tank. Although, over time after several drains and refueling. The actual capacity gets smaller and smaller. So it's charging to 100% of the very little to no capacity.

  • Has been plugged in constantly when used.

As weird as it sounds this is actually really bad for the battery. Yes, it does keep it charged constantly but batteries do have a “memory" to say the least. If a battery doesn't get the chance to deplete and refill, its at a constant state of depleting. Rather than refilling.

  • Was left unused for a good amount of time (more than 2 or so months)

What happens is the battery voltage goes below the amount needed to power the device on its own and applying the power charging source is barely putting it past that threshold for it to work as it's plugged in but not unplugged.

  • Battery is not the original and was replaced with a “cheap” replacement.

This goes hand in hand with the previous one. When batteries are made they're sent to a warehouse until sold. So they're “New" because they haven't been used but they're not charged while waiting to be sold and discharging.

Overall a new battery will fix the issue. My recommendation go to a Battery Store such as Batteries Plus Bulbs. They'll get there batteries fresh each month and maintain them as well as they'll come with warranties. You'll pay more but it's cheaper than a new laptop.

If these do not fit the criteria of your issues then I would recommend contacting the manufacturer.

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Hi @tcashew

Create a Win 10 battery report to find out the state of the battery.

Even though is shows 100% it may not be able to supply the necessary power when a load is connected to it.

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It may be caused by two reasons:

Update or upgrade windows 10

If you’ve recently upgraded the operating system of your laptop to Windows 10 or updated to the 1809 update, maybe this is the reason for the issue.


Faulty battery

On the off chance that your PC closes down once you unplug the connector, it normally implies your battery isn't working as expected.

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Tony Cashew さん、ありがとうございました!
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