You may not be seeing the Forum Tip. It reads:
Tip: If you are asking for help to troubleshoot a computer-related problem, please be sure to include all the necessary information (ie: operating system, model number, hardware, software, etc) that will help others identify your problem for a speedy resolution.

You may need to tell the make/model as well as how the OS was installed on these machines. For example, XP will not know about batteries on laptops until some number of drivers are installed. Your laptop maker and support will have to tell you what these drivers are.

In the case of a Dell, I had to update a BIOS to enable the second battery to show. This is another example of why the make/model matters.

Hope you find your answers.

Bob