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Inspiron 14 N4050: replace CMOS battery (a.k.a. BIOS battery) - sealed
I have the laptop open to clean out dust and do new thermal paste. I want to replace the CMOS battery, but it's a sealed unit. The battery is covered in plastic with wires exiting from the plastic "envelope".
Is it possible to open it up and replace with a standard coin cell battery, connecting the wires to the bare metal battery?
Or, must I buy one of those sealed units like what I removed?
ejn63
10 Elder
10 Elder
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June 21st, 2022 11:00
There's a CR-2032 lithium battery inside -- yes, you can replace just the battery. Just wrap the leads tightly in dielectric tape (soldering or heating not recommended -- the battery is not going to stand up to heat without dramatic effect).
XPS_Man
5 Practitioner
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June 21st, 2022 12:00
Yes you can
https://www.youtube.com/watch?v=Mzr7Mbm1L3k
you can also buy the complete assembly , 10$ max
filbert
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June 21st, 2022 14:00
Thank you ejn63 and XPS_Man
I need to see if I have any high-heat resistant tape on hand, or a wide diameter heat-shrink tubing.
filbert
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June 22nd, 2022 11:00
In the video you linked, could you understand why he needed to fit the old blue shrink-wrap ring around the new battery? I didn't see the point, since he slipped the battery and contacts in heat shrink tube anyway. I can't see what benefit the old ring provides.
AdelNancib
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April 25th, 2023 08:00
Hello filbert,
I wish this message finds you well.
I really want to know if you found the solution. Because my Laptop (Dell Inspiron N4050) is stucking at 1/3 splash bar of starting and I tried to replace RAM, Hard drive and other solutions but didn't work for me. I want to ask you if the CMOS Battery could be the problem, If so Did you replace it by your own and worked for you?