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  #1  
Old March 22nd, 2019, 12:28 PM
leachim leachim is offline
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Dell 17R CMOS battery charge

Wont hold time or date

Took out and tested - 2.9v

Replaced with one 3.1v

No change - date goes back to 2013

Would there be another reason for this

Laptop wont boot - just wondered if this was the reason - Startup repair doesn't fix it

Thanks
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  #2  
Old March 22nd, 2019, 10:30 PM
renegade600's Avatar
renegade600 renegade600 is offline
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did you replace it with the exact same battery type?
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  #3  
Old March 22nd, 2019, 10:39 PM
leachim leachim is offline
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yep

cr2032
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  #4  
Old March 22nd, 2019, 10:41 PM
leachim leachim is offline
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Stop press

Now replaced with NEW battery

Still wouldn't boot, but DID do a RESET which it wouldn't before

Kept the time too.

Maybe measuring voltage is not enough when not under strain
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  #5  
Old March 23rd, 2019, 04:13 PM
Digerati Digerati is offline
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Quote:
Maybe measuring voltage is not enough when not under strain
To accurately test any battery (any power supply actually) it must be done under a realistic load. Testing "out of circuit" with a multimeter does not impose a load.

When you replaced the battery, did you remove the main battery and unplug the computer from the wall first? And after you inserted the new battery, did you boot directly into the BIOS Setup Menu, set the date and time and then "Save and Exit"?

For the record, I have had brand new (and brand name) CR2032 batteries be bad right out of the packaging.
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