Question

Laptop battery says it's charging, when it's not plugged in.

Hi, I have this HP 2000 Notebook laptop and it’s about 3 years old now, and I have this weird issue with my laptop. I did a battery check on it using the HP Support Assistant (the battery check said the battery was OK) and after it was done checking the battery it started showing that the battery is charging, but it’s not plugged in. It was at about 57% during the check, and I unplugged the laptop when it was at 100% earlier. As I’m typing this it’s saying “0% Available (plugged in, charging)”.
I’ve never replaced the battery on this laptop, but I have a spare battery from a different laptop, the laptop stopped working about 2 years ago because of a damaged hard drive. (the laptop was less than a year old when it stopped working).
Would the old spare battery work to replace it with?
This laptop is fairly old, so I don’t really want to purchase a whole new one, because the laptop may stop working altogether soon because of it’s age.

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Answer
Only one way to test. Try it.

But the failed HDD could be a clue too. If you didn't use the HP restore media, drivers could be incorrect or incomplete. You may have noticed how hard it is to install Windows from scratch. Even I no longer write much about it other than to use restore media.

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I tried it and now it wont charge fully.

I put in the spare battery, and did a battery check on it, and it's saying that the capacity is 82%
Does that mean I can just never charge it fully? I charged it up to 98%, unplugged it, and it immediately dropped to 82%
How can I change that?

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Your'e asking a lot here

Because we don't know about this HDD failure that you mentioned.
It can be drawing a lot of power and deplete the battery post haste.
Tell us more.

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Any battery over 2 years is suspect.

I do not waste time on old batteries at the shop. Some clients get upset that we won't test old batteries. Well that's not true. Our test is to slip is a new battery and see if that cures it.

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