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  1. *Read guide note* How to rebuild a laptop CMOS battery, Determine what battery you need: step 1, image 1 of 2 *Read guide note* How to rebuild a laptop CMOS battery, Determine what battery you need: step 1, image 2 of 2
    • Most laptops use a CR2032 or 2025 cell. The CR2016 cell is uncommon.

    • Take the battery apart and check out what cell you need. This may be difficult depending on the wrap used.

  2. *Read guide note* How to rebuild a laptop CMOS battery, Disassemble the CMOS battery: step 2, image 1 of 3 *Read guide note* How to rebuild a laptop CMOS battery, Disassemble the CMOS battery: step 2, image 2 of 3 *Read guide note* How to rebuild a laptop CMOS battery, Disassemble the CMOS battery: step 2, image 3 of 3
    • If you break the leads, a new battery will need to be purchased.

    • After purchasing a battery, disassemble the CMOS battery. Use caution not to heavily bend the tabs. Too much damage may make them unusable.

    • Break the tabs off of the old battery. Dispose of based on your local laws.

  3. *Read guide note* How to rebuild a laptop CMOS battery, Verify polarity and tape the leads onto the new cell: step 3, image 1 of 3 *Read guide note* How to rebuild a laptop CMOS battery, Verify polarity and tape the leads onto the new cell: step 3, image 2 of 3 *Read guide note* How to rebuild a laptop CMOS battery, Verify polarity and tape the leads onto the new cell: step 3, image 3 of 3
    • ONLY USE ENOUGH TAPE FOR A FIRM HOLD. Using too much may lead to a shorted cell!

    • BEFORE INSTALLING LEADS ON THE CELL, TEST THE CELL WITH A MULTIMETER TO CONFIRM THE POLARITY!

    • After the polarity has been matched, tape the positive lead to the new cell. To remove the risk of a failed rebuild, start on the + side and cut the tape to fit comfortably.

  4. *Read guide note* How to rebuild a laptop CMOS battery, Apply tape to the negative terminal: step 4, image 1 of 1
    • To place tape on the negative tab safely, try and keep the tape you cut as close as possible to the example image.

    • If possible, OFFSET the tape and terminal placement from the positive as much as possible.

    • After confirming there is no tape causing a short, add tape to the negative tab and tape down the negative terminal onto the new battery.

  5. *Read guide note* How to rebuild a laptop CMOS battery, Apply liquid electrical tape: step 5, image 1 of 3 *Read guide note* How to rebuild a laptop CMOS battery, Apply liquid electrical tape: step 5, image 2 of 3 *Read guide note* How to rebuild a laptop CMOS battery, Apply liquid electrical tape: step 5, image 3 of 3
    • Perfect coverage is not required. Focus on covering the major parts of the battery.

    • After verifying both leads are securely held onto the new cell, apply liquid electrical tape to the battery. 2-3 medium thickness coats are recommended.

Заключение

After building the replacement cell, install it in the notebook. Verify the battery works by setting the BIOS, powering it off and then removing the battery/AC adapter. If the CMOS memory is retained, your battery works.

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Nick

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