The Windows Power Meter tab in Windows XP power options in the control panel shows actual information about the installed laptop battery pack. Below is an example what information is displayed.
It’s unknown to what extend laptop battery information is validated by the POST controller on the motherboard. It’s not unlikely battery information is checked and may result in rejection of a laptop battery through a “battery not recognized” notification.
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| Windows Laptop battery information in power options |
If the above window with "Detailed information about battery #1 or #2" shows no information about the laptop battery it's unlikely the charging process is started by the POST controller.
Causes of laptop battery rejection may be:
- Failed communication between laptop battery and POST controller
- Invalid laptop battery memory contents
- Electronic faults
- Hacked “refurbished” batteries
"Refurbished" laptop batteries can be tested using the simple laptop battery test. New "refurbished" laptop batteries with significant less capacity than listed are probably "refurbished" through a factory reset of laptop battery memory.
Back to the laptop battery charging diagram.
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