inspiron 510m CMOS battery

I think yes, the system been disconnected from main power for any period of time without a charged main battery. It's sister's notebook and she has used it rarly. 6 month ago, she gived me the notebook because there was this error. I have tryed to use a charged main battery, but always the same error. Maybe it's better to replace the CMOS battery, but where can i buy it ?

Try parts-people.com

or

Dell Spare Parts 1-800-449-3355 ext 7269937

It is inside the battery compartment behind a small door.
It is very unusual for a reserve battery to fail in a system this new - what are the symptoms you're looking to fix?

If it's a CMOS password you're trying to remove, by the way, disconnecting the battery will not do it.

http://support.dell.com/support/edocs/systems/ins510m/sm/reserve.htm#1123661

I have this error : Invalid configuration information - please run SETUP program . Press F2 when notebook started give me the same error.

Has the system been disconnected from main power for any period of time without a charged main battery? The CMOS battery charges from the main battery - it may simply have lost its charge if so.