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How does Windows detect battery issues?

I have a laptop that's a little over 5 years old, and I've never changed the battery, so I believe Windows 7 when it tells me "there is a problem with your battery", and to consider replacing it.

My question is: how does it detect a dodgy battery? Does the battery not have the same voltage that it used to?

I think this is an interesting question, and could form the basis for a blog post with some more detail about how battery technology works and why batteries degrade over time, or perhaps more detail about ACPI and how it works.

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    It is too vague; as different versions of Windows act detect & react differently.
    – tomByrer
    Commented Jul 20, 2013 at 13:36
  • 2
    So then have different sections of the blog talking about different versions of windows. Simple thinking @tomByrer
    – OnkaPlonka
    Commented Jul 27, 2013 at 6:45
  • Fair enough @OnkaPlonka Perhaps there should be different sections for different battery tech as well?
    – tomByrer
    Commented Jul 29, 2013 at 19:37
  • Great Idea! P.S. Sorry if the 'Simple Thinking' sounded a bit like I has having a go at you as this was not the intention.
    – OnkaPlonka
    Commented Jul 31, 2013 at 6:25
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Windows 8.1 comes with SQL Server and Visual C++?

My friend got a new Windows 8.1 laptop. I am helping her cleanup things that came "free" from HP (games, etc).

In the list of programs installed, I see "Microsoft SQL Server 2005 Compact Edition" and 9 versions of "Microsoft Visual C++ Redistributable" (ranging from 2005 to 2010).

She is no developer and never installed those. What are they doing here? Is it safe to uninstall?

Just a good question: Very clear, easy to get to the point.

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  • You're about a year too late...
    – user201262
    Commented Apr 14, 2014 at 18:49

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