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Hi all, I have a 3 or 4 years old hp-pavilion laptop and I'm having troubles with the battery.
When the battery level gets below +/- 45% the charge drops very fast until the laptop shuts down.
After this the battery will not charge to 100% anymore, but to about 80%.

Now I know how to 'recalibrate' the battery.
I boot into the bios screen and let it drain the battery, and after the battery is fully unloaded I charge it again without using the laptop until the indicator indicates that it is fully charged again.
After this I can use my laptop normally as before, until the battery gets below 45% again.

So maybe this battery is bad, I don't know.
What confuses me is that when the battery will not charge beyond 80% power statistics show that the battery has a energy level of 23,4 watt, which is the maximum, but battery percentage shows 80%.
The indicator on the laptop is orange indicating that the battery is not fully charged.

So where is this contradicting information coming from?
Does the battery itself give information about it's energy level directly to the OS (ubuntu 20.04), or does the OS get the information from something on the motherboard.
And how can the information on the OS contradict is self?
Saying the energy-level is at a maximum of 23,4 watt and also saying the battery is charged 80%.

Is this a hardware or a software problem?
01-21-2021, 08:21 AM
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