Solved How do I change Cmos battery?

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BJC1992

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I have recently acquired a Compaq NC6320, the date and time are always wrong, always reverting back to December 1980. I open it up to change the battery, it says on a label that it must have a CR2016, but on the yellow tape the existing battery is in it says CR2032 so not sure which one is correct. So I then remove the outer yellow tape and there are 2 points where the wire has been soldered on each side of the battery. I haven't seen this before, I thought it would be a case of pop the old one out and put in the new one. So would I have to solder the wires onto a new battery, as this isn't what I expected. Any help would be much appreciated.
 

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Advent SE 1101
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Windows 7 32 Bit
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AMD Sempron(tm) 140 Processor 2.70Ghz
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Nvidia GeForce 210
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Laptop
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Dell Precision 15 7550 Workstation
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Windows 10 22H2 Pro
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Intel(R) Xeon W-10885M
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Dell
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2x 32 GB DDR4 ECC memory (128 GB max)
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Intel onboard GPU 1080p - Quadro RTX 5000 Max-Q GPU 4K
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CR2016 and CR2032 are almost the same being the CR2032 a little thicker than CR2016 and has bigger capacity. Both are same voltage (3 V)
Easy solution is to buy a CR2016 or CR2032, remove the old battery from the MB (pull by the socket), un solder the cables from the old battery and solder the cables on the new battery. Put a tape on it (or a heat shrink tube) and put it back.

You can also buy
Amazon.com
 

My Computers

System One System Two

  • Computer type
    PC/Desktop
    Computer Manufacturer/Model Number
    custom build
    OS
    Windows 7 HP 64
    CPU
    i5 6600K - 800MHz to 4200MHz
    Motherboard
    GA-Z170-HD3P
    Memory
    4+4G GSkill DDR4 3000
    Graphics Card(s)
    IG - Intel 530
    Monitor(s) Displays
    Samsung 226BW
    Screen Resolution
    1680x1050
    Hard Drives
    (1) -1 SM951 – 128GB M.2 AHCI PCIe SSD drive for Windows 7 and Lubuntu
    (2) -1 WD SATA 3 - 1T for Data
    (3) -1 WD SATA 3 - 1T for backup
    PSU
    Thermaltake 450W TR2 gold
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    Old and good Chicony mechanical keyboard
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    Logitech mX performance - 9 buttons (had to disable some)
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    500Mb/s
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  • Computer type
    Laptop
    System Manufacturer/Model Number
    Asus Q550LF
    OS
    Windows 7 Pro
    CPU
    i7-4500U 800MHz to 3.0GHz
    Motherboard
    Asus Q550LF
    Memory
    (4+4)G DDR3 1600
    Graphics Card(s)
    IG intel 4400 + NVIDIA GeForce GT 745M
    Sound Card
    Realtek
    Monitor(s) Displays
    LG Display LP156WF4-SPH1
    Screen Resolution
    1920 x 1080
    Hard Drives
    BX500 120G SSD for Windows and programs +
    1T HDD for data
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    500 Mb/s
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    Firefox
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    TinyWall firewall
I've got a pack of the cell batteries already, a mixture of CR2016/CR2032 so I can use one of those if I was to solder the wires onto that, is it safe to do that though, wasn't sure if the current battery was different to allow it to be soldered.
To buy a replacement with the outer coating and wires will cost a minimum of $15, there are none I can find for sale in the UK.
 

My Computer

Computer type
PC/Desktop
Computer Manufacturer/Model Number
Advent SE 1101
OS
Windows 7 32 Bit
CPU
AMD Sempron(tm) 140 Processor 2.70Ghz
Memory
4GB (3.12GB Usable)
Graphics Card(s)
Nvidia GeForce 210
Sound Card
Nvidia High Definition Audio
Monitor(s) Displays
Compaq 7500
Hard Drives
320GB
Keyboard
Standard PS/2 Keyboard
Mouse
Microsoft PS/2 Mouse
Antivirus
Avast Antivirus Free
Browser
Google Chrome
Other Info
ACPI x86 Based PC
Sure, solder it. But do as Megahertz07 said and tape the connections.
 

My Computer

Computer type
Laptop
Computer Manufacturer/Model Number
Dell Precision 15 7550 Workstation
OS
Windows 10 22H2 Pro
CPU
Intel(R) Xeon W-10885M
Motherboard
Dell
Memory
2x 32 GB DDR4 ECC memory (128 GB max)
Graphics Card(s)
Intel onboard GPU 1080p - Quadro RTX 5000 Max-Q GPU 4K
Hard Drives
1TB Samsung 9100 Pro main M2 SSD
2x 2TB Samsung 9100 Pro temp storage M2 SSD (6 TB max)
Mouse
Logitech MX-25 Bluetooth
Internet Speed
slow
Antivirus
MS
Browser
Pale Moon 34.x.x - x64 AVX2 build
OK I'll give that a go, thanks to all that's offered me advice
 

My Computer

Computer type
PC/Desktop
Computer Manufacturer/Model Number
Advent SE 1101
OS
Windows 7 32 Bit
CPU
AMD Sempron(tm) 140 Processor 2.70Ghz
Memory
4GB (3.12GB Usable)
Graphics Card(s)
Nvidia GeForce 210
Sound Card
Nvidia High Definition Audio
Monitor(s) Displays
Compaq 7500
Hard Drives
320GB
Keyboard
Standard PS/2 Keyboard
Mouse
Microsoft PS/2 Mouse
Antivirus
Avast Antivirus Free
Browser
Google Chrome
Other Info
ACPI x86 Based PC
Use a soldering iron with low capacity (30 to 40W)
Melt a little tin on each side of the battery surface. Be fast. Don't let the battery get very hot.
Let it cool. Place the wire over the battery (be careful with the polarity) and place the soldering iron over the wire just for some seconds.
Cover the battery with tape.
 
Last edited:

My Computers

System One System Two

  • Computer type
    PC/Desktop
    Computer Manufacturer/Model Number
    custom build
    OS
    Windows 7 HP 64
    CPU
    i5 6600K - 800MHz to 4200MHz
    Motherboard
    GA-Z170-HD3P
    Memory
    4+4G GSkill DDR4 3000
    Graphics Card(s)
    IG - Intel 530
    Monitor(s) Displays
    Samsung 226BW
    Screen Resolution
    1680x1050
    Hard Drives
    (1) -1 SM951 – 128GB M.2 AHCI PCIe SSD drive for Windows 7 and Lubuntu
    (2) -1 WD SATA 3 - 1T for Data
    (3) -1 WD SATA 3 - 1T for backup
    PSU
    Thermaltake 450W TR2 gold
    Keyboard
    Old and good Chicony mechanical keyboard
    Mouse
    Logitech mX performance - 9 buttons (had to disable some)
    Internet Speed
    500Mb/s
    Browser
    Firefox 64
    Other Info
    TinyWall firewall
  • Computer type
    Laptop
    System Manufacturer/Model Number
    Asus Q550LF
    OS
    Windows 7 Pro
    CPU
    i7-4500U 800MHz to 3.0GHz
    Motherboard
    Asus Q550LF
    Memory
    (4+4)G DDR3 1600
    Graphics Card(s)
    IG intel 4400 + NVIDIA GeForce GT 745M
    Sound Card
    Realtek
    Monitor(s) Displays
    LG Display LP156WF4-SPH1
    Screen Resolution
    1920 x 1080
    Hard Drives
    BX500 120G SSD for Windows and programs +
    1T HDD for data
    Internet Speed
    500 Mb/s
    Browser
    Firefox
    Other Info
    TinyWall firewall
OK great thanks for that, I'll get on and do that tomorrow, is definitely better than buying an overpriced battery from the states.
 

My Computer

Computer type
PC/Desktop
Computer Manufacturer/Model Number
Advent SE 1101
OS
Windows 7 32 Bit
CPU
AMD Sempron(tm) 140 Processor 2.70Ghz
Memory
4GB (3.12GB Usable)
Graphics Card(s)
Nvidia GeForce 210
Sound Card
Nvidia High Definition Audio
Monitor(s) Displays
Compaq 7500
Hard Drives
320GB
Keyboard
Standard PS/2 Keyboard
Mouse
Microsoft PS/2 Mouse
Antivirus
Avast Antivirus Free
Browser
Google Chrome
Other Info
ACPI x86 Based PC
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