Sorry I should not have used the word reset, and should have used the term re-flash.
As some of the dual bios systems will re-flash the primary bios chip, when you use the jumper (some will de this automatically when they detect a failure)
by removing the battery it only resets the settings back to default, as it forgets what changes you have made.
If a bios firmware has become corrupt it may need to be re-flashed (or the chip might need to be replaced)
Removing the battery does not perform that operation.
So the solution I have offered is slightly different one, although I did word it slightly incorrectly.