BIOS battery charging information
Most laptops provide information in BIOS setup about the connected AC power adapter and / or installed laptop battery pack. Although it’s for information only, it’s an important diagnostic facility.
The screen shot below shows a DELL Latitude D610 BIOS setup screen. The "AC adapter type" field changes instantly when the AC power adapter is connected or disconnected.
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Because of the AC Adapter Type field information is updated in real-time, it's an important diagnosis facility for the laptop battery charging process.
The AC Adapter Type field in BIOS setup can be used to test the laptop DC jack, DC plug and the power cable for intermittent connections.
BIOS battery charging diagnosis
When the AC power adapter is connected and listed as
"Unknown device installed"
or the laptop battery is listed as
"not recognized battery"
the laptop battery charging process will not be started by the POST controller.
Wondering if upgrading BIOS might solve a "battery not charging" problem? Read the section about the BIOS program code.
Windows 7 has native support for most laptop battery memory values and shows more information than Windows XP or Vista.
Back to the laptop battery charging diagram.
