1) Remove the AC adapter (Charger), and main Battery.
2) The CMOS Battery is now referred to also, as the RTC Battery.
Real Time Clock
3) Turn the laptop over, bottom side up.
The large rectangular cover in the middle, is the Memory Door.
Loosen the screws, lift on the Memory Door; on the screw side.
The RTC Battery is a coin-cell battery, in a plastic holder ('Bag'), with two wires coming out, that end in a small male plug connector.
Unplug the male connector from the motherboard, remove the RTC Battery.
Past this point cannot tell you exact location of those jumper pads.
Usually under a piece of Mylar plastic.
Often under the Ram Memory modules, or under the Wireless Module. ('Card')
The RTC Battery helps retain that password.
However there is also a capacitor, or capacitors; that hold a trickle charge - INDEFINITELY, after ALL power is removed.
Briefly touching the aforementioned jumper pads, relieves this stored trickle charge.http://www.dell.com/support/troubleshooting/us/en/19/Product/latitude-e4310
Scroll down.......-> Service Manual
Removing and Replacing Parts > Coin-Cell Battery
Hmmm, looking for jumper pad information I ran into this;
Looks like the jumper pad method will not work either,http://forum.notebookreview.com/dell-latitude-vostro-precision/394528-how-reset-bios-cmos-latitude-e6400.html
Read post -
applebook - 29th June 2008,
"There is no way to reset the Bios on the new Latitudes. Removing the
power and PRAM battery does nothing. Everything in the Bios is contained
in the EPROM flash chip and keyboard ROM chip. The E series uses a chip
that cannot be reset by jumpers either."
Next plan of attack is to take;
1) Drivers license, or some other valid form of identification
2) Proof of purchase
3) Credit Card
,down to nearest Dell authorized repair shop, and have the resident tech obtain the Master Password from Dell.
The Master Password will be used to either;
A) Create a new password
B) Eliminate the password
Tech keeps the Master Password.