How to R/R CMOS battery

I ws given this Dell notebook, but there is a password login and the previous stated he had forgotten the password. I was told that if i were to remove the CMOS battery this may reset to original state. If this is so.. How do I remove the battery??
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If you go to Dell's site, under support, you can find the manual for the laptop which has "how to" on making minor adjustments such as this.

This is a link to the Lattitude L400 (which is part of your tags for the question)

In there look under "Bottom Assemblly" for "Reserve Battery"
If it is a high security password, and not just a bios password you might have to perform an unlock, or send back to dell.

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Pops517Author Commented:
How do you perform the unlock? Not sure of the password status..
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BMPTS is correct. After some more research, it appears that dell holds theirs on a chip. If uplugging the battery doesn't work, then try this site.

Other than that, you will probably be talking to Dell support.
There is a document I wrote for the IBM T40 series that had this same problem (the doc gives you how to do the cable and where to find the software, and how to do the unlock again for the IBM).  (attached) not sure if it works for a dell or not... check the forum in the document... the location of the cripto chip will be different for sure, but check it out see if it helps read the ENTIRE document first!

some of the links in the doc are no longer active, but check here for lots o laptop info!
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