CMOS battery

Rich Greenberg

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Apr 4, 2013, 3:53:08 PM4/4/13

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How long should the CMOS battery (the [usually] coin shaped battery
[usually] mounted on the mb) last? I am finding that my Toshiba
Sattelite laptop loses the clock and CMOS settings if it is powered down
and unplugged more than a few weeks. Battery replacement time?

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Rich Greenberg Sarasota, FL, USA richgr atsign panix.com + 1 941 378 2097
Eastern time. N6LRT I speak for myself & my dogs only. VM'er since CP-67
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Happy Oyster

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Apr 4, 2013, 5:30:50 PM4/4/13

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On Thu, 4 Apr 2013 19:53:08 +0000 (UTC), ric...@panix.com (Rich
Greenberg) wrote:

>How long should the CMOS battery (the [usually] coin shaped battery
>[usually] mounted on the mb) last? I am finding that my Toshiba
>Sattelite laptop loses the clock and CMOS settings if it is powered down
>and unplugged more than a few weeks. Battery replacement time?

I guess it ought to be more than 2 years.
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Sjouke Burry

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Apr 5, 2013, 12:50:34 AM4/5/13

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ric...@panix.com (Rich Greenberg) wrote in news:kjkln4$alp$1
@reader1.panix.com:

> How long should the CMOS battery (the [usually] coin shaped battery
> [usually] mounted on the mb) last? I am finding that my Toshiba
> Sattelite laptop loses the clock and CMOS settings if it is powered
down
> and unplugged more than a few weeks. Battery replacement time?
>

4-10 years.
And your problem suggests that you have a chargeable battery
of bad quality, because normally a downtime of a few minutes is
enough to cause problems with a bad battery.
Your few weeks suggests that the battery is charging when the
computer is powered.
In which case a normal battery might not like that.

gargoyle60

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Apr 5, 2013, 4:23:30 AM4/5/13

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My old Windows 98 home PC still has the original battery and it continues working after 15 years!

On Thu, 4 Apr 2013 19:53:08 +0000 (UTC), ric...@panix.com (Rich Greenberg) wrote:

Don Phillipson

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May 2, 2013, 2:27:11 PM5/2/13

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"Rich Greenberg" <ric...@panix.com> wrote in message
news:kjkln4$alp$1...@reader1.panix.com...

> How long should the CMOS battery (the [usually] coin shaped battery
> [usually] mounted on the mb) last? I am finding that my Toshiba
> Sattelite laptop loses the clock and CMOS settings if it is powered down
> and unplugged more than a few weeks. Battery replacement time?

If a laptop is to be idle for more than a few days, it is prudent to
remove the power supply battery: otherwise it may be configured to
keep some functions activated, and thus deplete the battery (and
perhaps put extra demands on the CMOS battery as well.)

--
Don Phillipson
Carlsbad Springs
(Ottawa, Canada)

mike

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May 2, 2013, 5:50:21 PM5/2/13

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I'd argue with that.
Any rational design would let the main battery supply all functions
when available. No need to discharge the CMOS battery when not necessary.