Q: Resetting PMU on clamshell G3 iBook

I woudl like to try Resetting PMU on clamshell G3 iBook.

Why? Well, my new battery isn't charging and FORUM advice here is to reset PMU

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You could also try resetting the PMU.

http://docs.info.apple.com/article.html?artnum=14449

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but link does not help as it goes back to main page.

Can anyone here advise please?

Thank you.