How to Tell if a Laptop Battery Is Bad

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In order to tell if a laptop battery is bad, look at the power meter under Power Options to see if an unplugged computer loses more than one percent of its charge per minute. Find out how to use a light meter to test the battery on newer laptops with help from a laptop repair specialist in this free video on bad laptop computer batteries.

Part of the Video Series: Laptop Repair & Maintenance
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Video Transcript

Hi, this is Nathan Morgan with, in this video I'm going to show you how to determine if your laptop battery is bad, there's several different ways to do this. What you'll need to do is, go to your Start menu, choose Control Panel and choose Power Options. Inside the Power Options, there's a Power Meter that shows the percentage of how charged your laptop battery is. You want to charge that battery to a hundred percent. And with the laptop running, you want to unplug it for ten minutes. And after ten minutes, if your battery has lost more than one percent per minute or if it has lost more than ten percent in ten minutes, your battery most likely needs to be replaced. And on some newer models, a quick way to test your battery, is using the light meter. You press it once and it shows how charged your battery is. If you hold down the button, the lights will come on and then go back off. And if they come back on, the more lights that come on, the more the cells are damaged. So on this particular battery, no lights came back on, so the battery is good, if all the lights came back on, the battery is bad. And that's all you need to know for testing a laptop battery. This is Nathan Morgan with


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