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crwdns2944351:0crwdnd2944351:0*Read guide note* How to rebuild a laptop CMOS batterycrwdnd2944351:0crwdne2944351:0

crwdns2933797:0Nickcrwdnd2933797:0crwdne2933797:0

crwdns2936043:0crwdne2936043:0 crwdns2933505:0crwdne2933505:0 Nick

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PC Laptop
Type
technique
Title
How to rebuild a laptop CMOS battery
Introduction
If your laptop has a dead CMOS battery and the OEM no longer sells new CMOS batteries (and aftermarket ones are hard to find), it is possible to take the dead battery apart and replace the cell so your laptop holds the CMOS contents again. ''''' Note: This procedure is only recommended for older notebooks. If replacements are readily available, it's better to buy a pre-assembled battery. This approach is error-prone unless you can get this right without error.'''''
'''''Guide notes:'''''
* The cell does not need to be 100% covered. However, everything you can get to must be protected.
* Disassembly of your laptop is not covered. '''''Every laptop is different, so research the disassembly procedure for your specific laptop.'''''
* '''''This guide ONLY applies to coin cell rebuilds. Do not use this guide for other style batteries.'''''
* When adding tape to the cell, make sure you do not create a direct short. To avoid this, place the tabs slightly higher than the factory placement and cut the tape sorter then needed.
* '''''Use liquid electrical tape to protect the cell. This can also be removed if you get the procedure wrong.'''''
Time Required Min
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Time Required Max
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Imageid
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Difficulty
Moderate
Conclusion
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.'''''
Author
Nick
Public
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  • Alumunum tape x1 Used to hold the cell leads. (featured) added.
  • Utility Knife x1 Used to cut the tape. Substitute with scissors if needed. added.
  • Liquid electrical tape x1 Used for cell protection. added.

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  • CR2032 Lithium Battery x1 Most common cell used. added.
  • CR 2016 3V Lithium Batteries x1 Less common then the CR2032, but still frequently used. added.

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  • In Progress added.
  • Community-Contributed Guide added.

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