Member Avatar for fayisi

My battery is 100% charged but when ever I take off the A/C adapter the machine will just go off.Now the battery is charged up to 82% but what see at the notification is pluged in, not charging. And when i take off the a/c cable the machine will just go off.

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  • Latest Post Latest Post by Rik_
hermann.loic commented: Hello I had thesame problem once but trust me no one can troubleshoot and fix a battery I will advice you change the battery.Go get anew one and every thing will be ok +0

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Brief expert summary and a safe troubleshooting order (builds on remarks from , , and ). The symptom described points to three possibilities: the battery cells or internal battery electronics failing, the charger/charging circuit not providing or recognising proper power, or an OS/firmware battery-reporting error. The fastest approach is to isolate which of those it is before buying a replacement.

  1. Isolation test — battery vs adapter/board: power off, remove the battery, plug the AC adapter and try to boot. If the machine runs reliably on AC only, the adapter and jack likely supply power and the battery is suspect. If it will not run on AC alone or cuts out, suspect the adapter, DC jack, or motherboard power circuit. (Note: some models will not boot without a battery; if the machine refuses to start, test with a known-good adapter or use the built-in diagnostics.)

  2. Reseat and inspect: power down, remove the battery, clean contacts with a soft cloth/isopropyl if available, reseat firmly and retry. Also look for swelling or damage — swollen batteries are a safety risk and must be replaced.

  3. Software/driver checks: in Device Manager uninstall the "Microsoft ACPI-Compliant Control Method Battery" entry under Batteries, then reboot so Windows reinstalls it. On Windows 8/10/11 generate a battery health report with:

    powercfg /batteryreport /output C:\battery-report.html

    Open that file and compare design capacity vs full charge. A large drop means the pack is worn.

  4. Firmware/diagnostics: run the HP hardware/BIOS battery test (startup diagnostics or HP Support Assistant) to read cycle count and health. If the report shows healthy cells but the status stays "plugged in, not charging," check that the adapter is the correct OEM rating (voltage and amperage) and try a known-good adapter.

If the battery cannot supply load in the isolation test or the report shows very low full capacity, replacement is appropriate. When replacing, match the ProBook part number and voltage/Wh rating and prefer OEM or reputable vendors. After replacement, calibrate the gauge by fully charging, discharging to automatic shutdown, then fully charging again. If these steps do not clarify the fault, the charging circuit or service-level repair is likely required.

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Member Avatar for BigPaw

How old is the Laptop and battery?

As batteries age the amount of charge they are able to hold reduces, but the battery doesn't "know" this and will report the maximum charge it is able to hold as 100%. For example, if due to age or misuse a battery can only hold half of the charge it once used to, then the system will see that as the most it can hold and call it 100%. But, just imagine that an old battery could only hold just 2 or 3% of what it once could? The system would see that 3% at the maximum of what it could hold and would report it as 100%.

So, if the battery is old, this may explain your problem.

Member Avatar for 3knur8

You need to replace the battery.

Member Avatar for Rik_

Before you replace the battery, are you using the original charger or are you using one of those cheapo non-original replacement ones?

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