Question about Acer Aspire L100 PC Desktop

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How do i change the CMOS battery in Acer L100?

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You will have to open it up and you will see the cmos battery on the motherboard its the small round silver one.
just take your time when you open it up.

Posted on Apr 13, 2015

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Your manual will describe exactly what to do. It is not difficult.

Posted on Nov 11, 2009

  • atheyus Apr 26, 2011

    The manual does say how to replace or remove or even mentions that is has a internal battery!

  • David W Finley Apr 26, 2011

    I apologize for not investigating more what Acer put in the User Manual. They basically left it up to the purchaser. All they tell you is how to plug things in and turn it on. To get to the battery, the most common type is the button cell. It looks like a quarter and is mounted flat on the motherboard, but sometimes in an upright holder (rarely). There is normally a 3 pin jumper near this battery used to drain the information left in the CMOS, which can prevent a computer from booting, thinking it has the wrong components. If you find this jumper, move the 2 p short from existing 2 pins to the remaining pin ( over one). I hope this doesn't sound too confusing. If this is too dificult, you can remove the battery cell from it's holder and measure it with a meter. Be sure to put it back in the way it came out. Also, if you moved the jumper for 30 sec. make sure you put it back over one pin (nrm position). You can buy a new button cell at Radio Shack or even any battery outlet. I really hope this helps, Sorry I was hasty the first time.



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SOURCE: On boot up Acer Aspire L100 loses current date and

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Posted on Aug 25, 2011

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How to I change the battery on my acer aspireL100

First, ensure that your power adaptor is consistantly powering your system and watch for intermittant operation with the adaptors green light. (This rules out cord breaks for shorts)

Second, all laptops have a removable battery: You can find a replacement at

Laptop batteires serve to power your CMOS (Carbon Metal Oxide Semiconductor) on your laptop, and keeps your internal BIOS clock accurate. On Desktops, it's a lithium battery on the mainboard.

Also, check to ensure that you do not have a battery recall on the unit as well, as you may be able to get a free replacement.

If your clock is off by a few minutes, change time servers in the windows clock option. Just double click the time on the task bar, click internet time, and you can this one if you don't have it listed: Some are overloaded due to requests. That should keep you with arc seconds on the actual usno time clock.

Good luck.

Good luck.

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Please rate me solved if you like my solution.

Best regards,


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