Battery removal causes CPU throttling in laptops.

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kiekie
Member

06-27-2016, 02:06 PM

My girlfriend's Lenovo L540 with a Core i3-4000M seems to run at only 0.80GHz when the battery is removed from the laptop, even if I have something running in the background like Twitch or YouTube. As soon as I put the battery back in, the CPU is running at 2.4GHz. The power plan is always set to maximum performance so I'm not quite sure why it's throttling like that. It's definitely not overheating since the fan isn't spinning and I have it set to "active cooling"

kiekie

06-27-2016, 02:06 PM #1

Aumarke
Junior Member

06-27-2016, 04:30 PM

Never take out a battery while it's still running, that's not proper.

Aumarke

06-27-2016, 04:30 PM #2

Never take out a battery while it's still running, that's not proper.

kelusky101
Member

181

06-29-2016, 12:12 AM

Restarting the laptop using only the wall charger has no impact.

kelusky101

06-29-2016, 12:12 AM #3

Restarting the laptop using only the wall charger has no impact.

CryptiCFutur3
Junior Member

06-29-2016, 01:43 AM

Nope no difference. The fan spins regardless of whether the battery is installed or not.

CryptiCFutur3

06-29-2016, 01:43 AM #4

Nope no difference. The fan spins regardless of whether the battery is installed or not.

Zephco
Member

06-29-2016, 09:26 PM

Are you experiencing the same shutdown behavior? Check your BIOS settings for temperature readings. Have you performed a CPU stress test to trigger a restart?

Zephco

06-29-2016, 09:26 PM #5

Are you experiencing the same shutdown behavior? Check your BIOS settings for temperature readings. Have you performed a CPU stress test to trigger a restart?

ripa5000
Posting Freak

884

07-01-2016, 04:06 AM

Prime95 execution shows moderate CPU activity at 33%, CPU remains locked at 0.8GHz. When battery is connected, utilization jumps to 100% with a higher lock speed of 2.38GHz. Expect increased thermal output.

ripa5000

07-01-2016, 04:06 AM #6

tcunhaa
Junior Member

07-03-2016, 12:35 PM

33%? Are the cores being restricted? I’m curious if a different charger is required. Maybe in some way the charger can’t supply as many amps as the battery needs when the system is working hard?

tcunhaa

07-03-2016, 12:35 PM #7

33%? Are the cores being restricted? I’m curious if a different charger is required. Maybe in some way the charger can’t supply as many amps as the battery needs when the system is working hard?

oOEmmaOo
Posting Freak

818

07-03-2016, 07:41 PM

I’m not sure because I can handle Prime95 and charge the battery from zero without any issues. All four threads are listed in Task Manager. It might just be a Windows corruption problem.

oOEmmaOo

07-03-2016, 07:41 PM #8

I’m not sure because I can handle Prime95 and charge the battery from zero without any issues. All four threads are listed in Task Manager. It might just be a Windows corruption problem.

ZzeoTexX
Member

238

07-04-2016, 10:19 AM

Consider installing Windows on another drive and retesting. Check if the performance improves. A BIOS update might also resolve the problem.

ZzeoTexX

07-04-2016, 10:19 AM #9

Consider installing Windows on another drive and retesting. Check if the performance improves. A BIOS update might also resolve the problem.

senne632
Member

123

07-06-2016, 12:07 AM

#10

Wait. I'm trying to understand this. Why would you be taking the battery out while using it? Or am I misunderstanding and the device is functioning normally before the CMOS battery was removed?... Or is it the laptop battery?

senne632

07-06-2016, 12:07 AM #10

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