Laptop shuts down at random battery percent without any warning

[Rahesh]

Hi my laptop shuts down at some random percentage when it runs on DC power I have done the battery check from Hp support and have attached the results here please reply soon what's the problem and how to overcome

[HoarseHorace]

Your battery looks like it's past its prime. Specifically, from your picture:

Design Capacity: 2850 mAh

Full Charge Capacity: 1622 mAh (56%)

This means that at fully charged, your battery is only 56% of what it was when it was new. If it is a thin laptop, you should check for cell swelling. Remove the battery if it's easily changeable, or inspect the bottom of the laptop. Look for any deformation or bending of the plastic. If there is any bending, it's likely due to cell swelling and the battery definitely needs to be replaced.

You can try doing a battery calibration, but if the battery is bad, it won't fix it.

The battery in my HP laptop was completely toast (lasted for 5min on battery) but the HP battery tool said it was good.

[Rahesh]

Hey HoarseHorace thanks for replying my laptop is not thin and doesn't have any swelling so should I do battery calibration ?

Can you guide me or send link on how to do battery cailbration Thank you

[HoarseHorace]

Here is the procedure for calibration.

https://support.hp.com/us-en/document/c04700771

In short, with its current max capacity, it's pretty much toast anyhow. Calibration might help give you a better indication of how much battery you have left and how long it will run, but it'll still probably die before it says it's going to anyhow.

For the long-term health of a Lithium-Ion battery, it should ideally be charged no higher than 80% and discharged no lower than 20%, but that only gives you 60% of the operating capacity. This is what electric vehicles use since battery size isn't a huge factor and battery longevity is more important. For laptops, even if you don't consistently charge/discharge it and always leave it plugged in, they're only good for 2-3 years typically. Keeping Lithium-ion batteries full essentially damages them.