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Laptop not keeping time between power cycles

This is a discussion on Laptop not keeping time between power cycles within the Laptop Support forums, part of the Tech Support Forum category. Ok, so I figured this would be a simple enough question for google, but after an hour of searching this


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Old 11-23-2019, 02:46 PM   #1
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Ok, so I figured this would be a simple enough question for google, but after an hour of searching this doesn't seem to be the case. Recently I opened up my laptop to blow out some dust etc., because it seemed to be idling warmer than normal. Fortunately while I had it open I noticed that the battery was extremely swollen, so I pulled it(running 10+ degrees cooler now). Now my laptop seems to have trouble keeping time between power cycles, and I just wanted to know if this is a normal side-affect of the laptop being powered down with no battery. It's always been my understanding that the CMOS battery was responsible for the system time, so I'm just wondering if it by chance went bad at the same time I removed the laptop battery, or if its somehow due to the battery not being there. This is the first time I've had the system time be wrong at startup (off by 4+ hours).
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Old 11-23-2019, 03:22 PM   #2
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When you pulled the main battery, the button one took over. Change it.
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Old 11-23-2019, 05:22 PM   #3
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As stated, looks like the CMOS battery has failed too.
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Old 11-24-2019, 04:32 AM   #4
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Quote:
Originally Posted by Corday View Post
When you pulled the main battery, the button one took over. Change it.
I was thinking maybe the CMOS failed first, possibly some time ago but wasn't noticed.
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Old 12-14-2019, 05:54 PM   #5
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Sorry for the late reply, I nearly forgot I had posted this question here. Anyway, I am pretty convinced that it is just the CMOS battery, though I find it strange that if I leave my laptop plugged in to power, it doesn't lose the time, no matter how long its off without a battery. I just wanted to make sure before I tried to change the CMOS battery, my laptop does some weird things from time to time, like the fact that my cpu usually stays at its full base clock or higher regardless of system load. Its something I've only noticed in about the last 2 months, as that's when I started using Rainmeter and added a cpu monitor to my desktop. I should probably create a separate thread for that though. Thanks for your help guys, its much appreciated.
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Old 12-15-2019, 01:23 PM   #6
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Quote:
if I leave my laptop plugged in to power, it doesn't lose the time
That is correct. Because you laptop is getting outside power, it will not loose the date and time. Until you shut it down and power it up again. To avoid that, replace the CMOS battery.
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