Question about Zeiss Humphrey Acuitus 5015 Autorefractor Keratometer Tested Calibrated Cornea

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Cmos battery where i can buy the battery ?

How,and where to change real time clock lithium battery.[ST M48T86PCI]

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I need the same. I found in Ebay

Posted on Oct 24, 2014

  • Mmatlou Devies
    Mmatlou Devies Apr 14, 2016

    At any store whereby the sales person sell them



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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

If you need further help, I’m available over the phone at

Aug 26, 2014 | Dell Computers & Internet


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.


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!


on Dec 03, 2009 | Computers & Internet

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


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...

2 Answers

How to change battery on asrock k7s8x motherboard

A coin-cell battery (CR2032) usually powers the real-time clock and CMOS memory. The battery is 3 Volts, 3/4" in diameter and 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.
Just open the desktop, locate the CMOS (Coincell) and remove using screw driver. Replace the battery with CR2032 or an equivalent one.The following brands are used interchangeably for this item: Energizer (ECR2032), Duracell, Panasonic, Eveready, and 3M etc, which can be purchased from any local electronics store.

Dont forget to appreciate the solution if I could have been of any help!

Feb 03, 2011 | Asrock K7S8X-R3 Motherboard

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When I start my TravelMate 527TXV, I have an error message for my "cmos battery bad" "Real Time Clock Error" & when I proceed to change my time in the Seyup Utility my computer...

go to this link The Battery # 2032 or can be smaller like a dime. to be sure buy the replacemente when you got the old one in your hand. You can buy it in Walgreens

Dec 23, 2010 | Acer TravelMate 527TXV Notebook

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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.


  • 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

Seth thomas autoset wall clock not functioning. replaced both sets of batteries (AA and CR2032), still not working.

I wish I had a solution... I'm in the exact same situation. I put in new batteries, and all I get is a faint reading of gibberish from the LCD screen, and that's it. I've tried following the instructions, but I can't set the time in the LCD clock, since it's unreadable, and almost completely gone. has a web page indicating that "they will be back with info", but no support or FAQ pages. Disappointing... I have three of these clocks, and they are all behaving the same way.

Apr 10, 2010 | Seth Thomas Radio-Controlled Howard Wall...

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