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Cmos battery where to by its battery. ST M48T86 PCI Real Time Clock lithium Battery

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My D 630 Win 7 laptop periodically resets time & date to the last manual setting? Is there a fix?


Not too difficult if your a member of the computer Dr mobile pc Dr's in black n white volkswagons. But it is the battery on the mother board
it should be 3.0 volt lithium watch battery 2016. Battery is dying an not holding its tsr programs on the cpu an reseting to defualt cmos
changing battery's information onyoutube based on your pc cabinet and its model and serial number. They'll play start to finish end user information on issues listed by steps

Aug 26, 2014 | Dell Computers & Internet

Tip

When Your Computer Will Not Keep Time, Replacing a Mother Bord Battery.


One may ask, why would I change the battery on my PC, and many of us don't even realize that there PC has one but believe it or not your computer would not be the same without it! .

The battery on your computer motherboard is responsible for feeding the configuration memory, or CMOS, and to feed the real time clock of the computer, the one that show the date and the time.

You can bet it's time to change your battery when your computer is giving one of the following error messages when you turn on your computer.


CMOS BATTERY STATE LOW
CMOS SYSTEM OPTIONS NOT SET
CMOS TIME AND DATE NOT SET.
CMOS CHECK SUM FAILURE

Another indicator of a low battery is a clock that, after being set, runs well while the computer is on,but shows the wrong time when the computer is turned on the following day (it is late).

The motherboard battery can be built using three different technologies:Nickel-cadmium (NiCd), NVRAM (Non-Volatile RAM) and Lithium (Li). The Lithium battery, which is a round one (the size of a coin) and can be easily found at watchmaker's and computer parts stores, has long been the most used type. To buy one of these batteries, all you have to do is to look for a model CR2032.

Replacing the motherboard lithium battery demands some care, it is important that you have your computer turned off, unplugged, and that you have gotten rid of any static build up you may have (you can do this by touching a metal object that is grounded or wearing a anti-static bracelet that is clipped to a ground).

The lithium battery may use basically three socket types: socket with upper tab, socket with lateral tab, and the socket into which the battery stands instead of lying.


While the replacement of the battery in the socket with the lateral tab or of the one that stands is simple – all you have to do is draw back the tab using your finger or a small screwdriver and replace it.

Replacement of the battery that has an upper tab covering it demands extra care. In this type of socket, if you raise the metallic tab to replace the battery, it will lose its pressure and will not make contact with the battery anymore,damaging the socket. In this case, the correct replacement of the battery in done pressing a small plastic lock at the side of the socket with the fingers or using a small screwdriver. That will allow the battery "to slide" laterally, not damaging the upper tab.

Congratulations friend! you have successfully fix your computer! Rest easy in the rewards of your efforts and smile smugly with the knowledge that you have saved yourself cash.

Good Luck and happy Computing!

Mr.Fix-it-Guy

on Dec 03, 2009 | Computers & Internet

1 Answer

Replace cmos battery of optiplex 740


hello
Here is how the cmos battery looks like(look at video) at 2:15 running time of video shows you the cmos battery that is simular to a big watch battery. here a link for battery
http://www.ebay.com/itm/Dell-OptiPlex-Desktop-New-Motherboard-Lithium-Battery-Bios-CMOS-3V-Clock-CR-2032-/200692910229?pt=LH_DefaultDomain_0&hash=item2eba3ac895

Feb 22, 2013 | Dell OptiPlex 740 PC Desktop

1 Answer

I have a HP 7600 minitower and it says that I need a new onboard battery?


hi


this is real time clock battery -- keeps CMOS and time working on the system.
the onboard battery is a quarter size shaped , on the mainboard.. not sure if youc an remove it or its soldered on -- you are looking for silver coin shape, part # CR2032

you can buy this at any RADIO SHACK or Shoppers Drug mart locations in Canada

Battery size: CR2032 (coin cell)
Battery type: Lithium

hope this helps

Jul 09, 2011 | HP Compaq dc7600 Convertible Minitower PC...

1 Answer

I brought a laptop off of someone and when I shut it down it and I can't get back in. I can't get the password from that person because I really don't know him.


hi


  • disconnect the power adapter, remove the battery back up
  • remove the screws from rear of notebook, exposing the larger portion of the area.

there is a small coin shaped silver object , its a lithium battery , (CMOS real time clock battery)

remove or disconnect it for about 1 minute. Place it back or reconnect it . screw the plastic part back to the rear of notebook , reconnect the battery back up and AC adapter. start computer -- this process of temporarily removing the small lithium battery will have reset the system to start up without password requirement.

i hope this helps

Nov 15, 2010 | Computers & Internet

1 Answer

Cmos battery bad real time clock error


Is time to replace the battery. Is gone.

May 05, 2010 | Acer TravelMate 512DX Notebook

3 Answers

Where isw the cmos battery


it's inside the computer, it's a small round, flat, silver battery similar to those in watches and tons of other devices. It stores the clock time when the computer is shut off. You will need to take apart the laptop carefully in order to get to it. Is your clock getting reset everytime you turn it back on? Then yes you will need to replace the battery.

Jan 21, 2010 | HP Compaq Evo n610c Notebook

1 Answer

Motherboard timer is not working properly


Every PC motherboard has a battery. That battery serves two purposes: to feed the configuration memory (also called CMOS) and to feed the real time clock of the computer (the one that show the date and the time).

An indication it is time to change the motherboard battery is receiving one of the following error messages when you turn on your computer: CMOS CHECKSUM FAILURE, CMOS BATTERY STATE LOW, CMOS SYSTEM OPTIONS NOT SET and CMOS TIME AND DATE NOT SET. Another indicator of a low battery is a clock that, after being set, runs well while the computer is on, but shows the wrong time when the computer is turned on the following day (it is late).

The motherboard battery can be built using three different technologies: Nickel-cadmium (NiCd), NVRAM (Non-Volatile RAM) and Lithium (Li). The Lithium battery, which is a round one (the size of a coin) and can be easily found at watchmaker's and computer parts stores, has long been the most used type. To buy one of these batteries, all you have to do is to look for a model CR2032 one.

Replacing the motherboard lithium battery demands some care. It seems to be a simple task, but it is not.

The lithium battery may use basically three socket types: socket with upper tab (Figure 1), socket with lateral tab (Figure 2), and the socket into which the battery stands instead of lying (Figure 3).

Fig 14e23e4b.jpg

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Fig 2

While the replacement of the battery in the socket with the lateral tab or of the one that stands is simple (Figures 2 and 3) – all you have to do is draw back the tab using your finger or a small screwdriver and replace it – the replacement of the batter that has an upper tab covering it (Figure 1) demands extra care. In this type of socket, if you raise the metallic tab to replace the battery, it will lose its pressure and will not make contact with the battery anymore, damaging the socket. In this case, the correct replacement of the battery in done pressing a small plastic lock at the side of the socket with the fingers or using a small screwdriver. That will allow the battery "to slide" laterally, not damaging the upper tab.
Whatever the socket used, don't forget that the replacement of the battery should be done while the computer is off.

Sep 14, 2009 | IBM ThinkCentre S50 8183 - P4 3 GHz...

4 Answers

CMOS battery replacement


Your Pc should have an Intel E210882 motherboard in it.
A coin-cell battery (CR2032) powers the real-time clock and CMOS memory. When the computer
is not plugged into a wall socket, the battery has an estimated life of three years. When the
computer is plugged in, the standby current from the power supply extends the life of the battery.
The clock is accurate to ± 13 minutes/year at 25 ºC with 3.3 VSB applied.
When the voltage drops below a certain level, the BIOS Setup program settings stored in CMOS
RAM (for example, the date and time) might not be accurate. Replace the battery with an
equivalent one. Figure 14 shows the location of the battery.
These batteries are very common and can be purchased at Wal-Mart, Walgreens, Etc...
Here is a link to the motherboard manual with battery replacement procedures:
http://www.asi.com.au/support/Drivers/V206/Manual/SR_English.pdf

Jan 04, 2008 | Computers & Internet

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