Question about Dell Latitude C400 Notebook

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How replaqce the main battery on dell latitude c540/ 640 laptop

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It pops right out. Just look at the new battery and then figure out where it goes, usually there is a little switch / latch.

Posted on Feb 22, 2009


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I need to unlock a bois pass word for dell latitude D800

The best way to unloc a BIOS password is to reset by removing the CMOS battery and while the mains is removed press the power button a few times and leave for about 30 seconds. Refit the battery and power up. Password should be removed.

Apr 12, 2013 | Dell Latitude D800 Notebook

1 Answer

Hi have got a dell latitude d630 laptop and a emos battery buy cant seem to be able to pinpoint what type i need many thanks

Under back of the laptop, you will find the service tags.
Go to dell official site to check your laptop details:

Also, if you need a replacement battery,those sites may helpful:9-cell dell LATITUDE D620 Battery
6-cell dell d620 battery

Oct 30, 2011 | Dell Latitude D630 Notebook

1 Answer

Got a dell latitude d520 charges battery ok will not power up with mains plugged in only works on battery power any ideas

Hi there!

Your laptop is working with just the battery but not with the main power. This issue you have here is usually caused by a motherboard problem but have you tried to remove the battery then try to turn on computer? If it works then you might just need a BIOS update for the computer of not then there's a high chance that the motherboard your using is having a problem using the main source.

Hope this helps!

Sep 07, 2011 | Dell Latitude D520 Battery PC Notebook

5 Answers

Mine is dell latitude d620 laptop.battery is new.problem is it was running both on ac and battery.suddenly battrey is not taking the charge but my laptop runs on ac power. can i remove the battery and run...

the batteries eventually wear out and quit taking a charge. You can run the system without a battery with no ill effects. replacements are about $100 for a new battery

Sep 27, 2010 | Dell Latitude D600 Notebook

1 Answer


try flashing the bios if windows is accesable or remove this little battery usualy under the keyboard and then take out the main battery and ac adapter for 15 mins

Sep 26, 2010 | Dell Latitude E5500 Laptop

2 Answers

My dell d620 laptop need a battery, I want buy one online, so everybody, how about this ?

The one you have listed is for a good price but this one may be a tad bit better:

Price is a bit better but its just knowing what the shipping is going to be.

May 28, 2010 | Dell Latitude D620 Notebook

2 Answers

How can i bypass my password on my dell

You cannot bypass the password security feature on a Dell, you have to contact their support team and give them the service tag off the bottom of the case.
Viewing Existing Asset Tag and Service Tag
  1. Boot the computer using a bootable floppy disk or CD.

  2. Type cd c:\Dell\Util and press <Enter>.

  3. Type asset and press <Enter>.

The only thing I can suggest if you want to try it.....remove the RTC (CMOS) battery for approx. 30 minutes. Re-attach the RTC battery, take out the main laptop battery and set it aside. Now, power up the laptop using just the AC adapter. Boot the laptop upand see if the password is cleared out. The laptop may still ask you for a password, just hit enter and see if that clears it off. If it does, get into the bios by striking F2 when you see the Dell splash screen and reset the time and date. power off the computer and reattach the main battery. reboot

The other option is to "short" the two contacts of the RTC battery until the laptop does its initial post. This can be done two ways, if your RTC battery is attached to the motherboard by a small cable, remove the battery and look at the socket the plug fit into. take a small wire and "bridge" the two contacts in the plug, this will "short" the connection and cause an immediate reset during POST. If your battery sits ina flat socket by itself, then remove the battery and short the two metal battery contacts inside the battery socket. Power the laptop up with this "short" in place until the laptop POSTS or for approx. 2 minutes until you are sure that POST has happened...just iin case you have your laptop torn apart and can't see a screen. Once this has happened, remove the "short" and put the system back together...again, it may still put the password test box up, just hit enter and see if it bypasses it.

You RTC battery is in a small compartment inside the main battery compartment, remoce the main battery and you will see a small access door on the side wall, the battery is in there.

Nov 03, 2009 | Dell Latitude D600 Notebook

1 Answer

Clear cmos password dell latitude d43o

Remove the keyboard, near the top is the coin shaped cmos battery, remove main laptop battery and remove the cmos battery for 10-15 minutes. Reseat the cmos battery, and reinstall the main battery and reboot. Make sure to get into the BIOS and reset the date and time.

Sep 30, 2009 | Dell Latitude D430 Notebook

2 Answers

Laptop only starts up with mains adaptor.

Hello, You need a CMOS battery that keeps the time and start-up state even when the laptop is not plugged in whether the regular battery is working or now. The CMOS battery is usually a simple watch battery (CR2032) but whatever battery you can probably buy it at rite-aid or radio shack. Google CMOS battery for your laptop type and also look for instructions on how to open up the place where the battery is located. Good luck!

Jun 06, 2009 | Dell Latitude 100L Notebook

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