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OFF TOPIC: My laptop's internal clock

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Distinguished Professor IV

Re: OFF TOPIC: My laptop's internal clock

CMOS batteries are no more expensive than watch batteries, as that's what they are.  They are the same thing.  Three or four bucks (or five, like don suggested above (was writing at the same time)).  You can get one at Walmart.  You just have to know which one to get, and will have to look up how to replace it.  Your computer manufacturer's website should have a tutorial on how to change the battery, and will probably tell you what battery you need, too.  Or, if you can get the old one out, just buy the same thing.   Hopefully replacing it won't be very hard.   

The main battery, on the other hand, probably just pops in, like you said, so it's an easy thing to do.  It most likely has some type of mechanism for holding it in place, but it should be easy to figure out.  This battery powers the whole computer, but the CMOS battery is the one that keeps the clock going, especially when the computer is off. 


Ryzen 5 3400G | MSI B450M Pro-M2 MAX | 16GB Corsair Vengeance DDR4 3000 | XPG SX8200 Pro 512GB NVMe | Windows 10 Pro
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Tutor

Re: OFF TOPIC: My laptop's internal clock

I buy 4-packs of CR2025 and 2032 at Harbor Freight for $3.49.
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New Poster

Re: OFF TOPIC: My laptop's internal clock

Gwalk.....I have the same laptop and I will atest to the fact it is a beast to take apart.  I found the service manual on the HP website with full instructions to take apart and reassemble my laptop.  I had a bad internal cooling fan.  Well after ending up with dozens and dozens of parts carefully placed on worktable!  I managed to replace the cooling fan.....reassemble the laptop....about two years ago.  I am typing on same laptop right now!  I feel like a computer guru.  ROFL 
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New Poster

Re: OFF TOPIC: My laptop's internal clock

Chewagirl,  My HP computer is about the same age as yours is.  Here are some photos to help you with the CMOS battery.  HP calls it the RTC battery.  It is just under the back cover for the computer.....no need to take the whole back of computer off.  Either it is just a slide of the battery compartment switch or maybe 4 screws holding the back cover on.  Just under there is the battery you need to replace.  Hope this helps you understand.  You will need to see the numbers on the battery before purchasing a new one.  


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Distinguished Professor IV

Re: OFF TOPIC: My laptop's internal clock

Is the thing with the wires coming out of it the battery itself?  If so, talk about proprietary.  Again, if so, that's rotten, as it appears you may have to buy their specific battery, rather than the tried and true, easy, simple button cell batteries that most other computers use.  I mean, it's still a button cell battery, per se, but made in such a way that it has to be their configuration of it.  That's just rotten.

Then again, I hope that's just some type of cover, and you can take that off, replace the simple battery, and replace that cover.  If not...again...rotten of them.     


Ryzen 5 3400G | MSI B450M Pro-M2 MAX | 16GB Corsair Vengeance DDR4 3000 | XPG SX8200 Pro 512GB NVMe | Windows 10 Pro
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New Poster

Re: OFF TOPIC: My laptop's internal clock

Gabe,  that is true.  The wires plug into the motherboard right in that area.  No cannot use just a walmart brought button battery.  These are available on ebay for a reasonable fee.....but need the battery part or computer model to get correct one.  I buy most of my computer parts from ebay.  So far have had great luck with batteries, hard drives, replacement cooling fans, replacement laptop keyboards and some wiring harnesses for HP laptop computers.

http://www.ebay.com/sch/i.html?_from=R40&_trksid=p2050601.m570.l1313.TR12.TRC2.A0.H0.Xhp+pavilio...
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Distinguished Professor IV

Re: OFF TOPIC: My laptop's internal clock

I'm glad the battery for the HP is easy to find and not particularly expensive, but it would still be nice if one could just pop into their Walmart or Rite Aid or something and get one. 

I'm glad my laptop, notebook and desktop all use the same battery.  Well, not the same battery, but the same kind.  LMAO.    


Ryzen 5 3400G | MSI B450M Pro-M2 MAX | 16GB Corsair Vengeance DDR4 3000 | XPG SX8200 Pro 512GB NVMe | Windows 10 Pro
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New Poster

Re: OFF TOPIC: My laptop's internal clock

yes I agree it would really be nice.  Actually I've never had to replace the CMOS in any HP laptop.  I've used HP laptops for many years.  So I too was surprised when I really looked at the thing.  I've seen it before when I opened the back but never really paid much attention to it.  But one does need the exact replacement part number or the exact laptop model number to get the correct one.  And I advise stay away from the ebay chinese sellers. 
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Distinguished Professor IV

Re: OFF TOPIC: My laptop's internal clock

No doubt.  The Chinese batteries are junk, as are a lot of the other cheaper batteries.  I stick mostly with the name brand or product branded batteries.  They may cost a little more, but you know what you are getting.  I made the mistake of buying some batteries from Amazon that were very nicely priced for a laser bore sight, but they died within five minutes.  The money saved was certainly not worth it.  Now, when I read reviews for products on Amazon, I make sure they are from verified buyers.  I learned that lesson very quickly.  Not all cheaper batteries online are junk, but nine times out of ten, they are.         

I bought the four pack of button cell batteries only because my old 2007 Dell Dimension E521 desktop, which I was putting Linux Mint on to give away, was having clock problems.  I knew the other three computers that I do still use have the same battery, so I figured I would just have them on hand if they die, as well.  For eight bucks, it was worth it.   


Ryzen 5 3400G | MSI B450M Pro-M2 MAX | 16GB Corsair Vengeance DDR4 3000 | XPG SX8200 Pro 512GB NVMe | Windows 10 Pro
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Moderator

Re: OFF TOPIC: My laptop's internal clock

Hi Chewagirl,

Sounds like our community has some solid advice. As always, take care when working with electronics! 

Amanda