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Pieter_2
Paper Tape
Posts: 4
Registered: ‎09-10-2018
Location: BE
Views: 3,711
Message 1 of 9

T480: Does not switch to secondary battery, turns off unexpectedly (Win10)

On a few previous occasions, while running my Lenovo Thinkpad T480 running Windows 10 (10.0.17134 Build 17134), it shuts down without any prior notice nor warning, loosing any unsaved data. Each time it occurred, the machine started up just fine when powering on, still on battery only.

It wasn't until today that I came to learn the reasoning. Prior before the unexpected shutdown, I had seen that Battery 1 was at 5%, and Battery 2 at around 80%. Minutes later, the laptop turned off without any warnings.

 

Once rebooted and still running on batteries only (not plugged in), the battery status shows:

 

2019-04-03 18_33_17-.pngBattery status after reboot

In other words, my laptop does not switch over to the secondary battery as soon as the first one runs out of juice. I have searched the forums but could not find any previous reporting of the same, so any advise how to troubleshoot this behavior? I'd really like to get this fixed as each time this occurs, I risk loosing any unsaved data.

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JimBobMC
802.11n
Posts: 264
Registered: ‎10-27-2016
Location: US
Views: 3,689
Message 2 of 9

Re: T480: Does not switch to secondary battery, turns off unexpectedly (Win10)

Yup ... same exact issue with my T480.

I've posted this fix to several other threads:

 

The windows 10 - 1803 update screwed up a lot of Thinkpads with two batteries.

So, I can see no downside to trying this fix, it fixed my T480 with dual batteries:

 

 I may have some extra unnecessary steps in here, but I wanted to be sure I didn't screw it up:

  • Open the Device Manager by searching for it or right-clicking the Start button and selecting Device Manager.
  • Click Batteries on the list to expand it and you should see two items (maybe three items – if your machine is equipped with two batteries there may be two, but on my machine which does have two batteries only one was displayed) Anyway:
  • You will see: : Microsoft AC Adapter
  •  And one or two  Microsoft ACPI-Compliant Control Method Battery (s)
  • Right-click on each item and choose Uninstall device. Yes, you are uninstalling your laptop's battery drivers, but don't worry because they will automatically be reinstalled when you restart your laptop.
  • Shut down your laptop.
  • Unplug the power cable from your laptop.
  • Power on the laptop (running on batteries now) and enter BIOS
  • Go to:  Config --> Power  -->  and select the option to “Disable built-in battery”
  • You will get a prompt that says the machine will power down if you continue.
  • Acknowledge the prompt  --> the machine shuts down.
  • If your laptop has a second removable battery, remove it.
  • Plug in the charger cable to your laptop, this puts the internal battery back on-line and powers up the system.
  • Let it stabilize at the desktop – if you want to check Device Manager you should now see the AC adapter and ONE battery (the internal battery, the 2nd battery is uninstalled and laying on your desk at this point).
  • Shut down the machine
  •  unplug the charger cable
  • install the 2nd external battery, making sure it it latched and then locked in place.
  • plug the charger cable back in
  • power on the laptop and boot to the desktop
  • At this point my machine was fixed – both batteries and the AC adapter were registered in Device Manager, and both batteries once again showed up as separate line items in the Microsoft battery taskbar item and functioned properly.
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Some years back I worked for IBM, currently I do not work for,
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Pieter_2
Paper Tape
Posts: 4
Registered: ‎09-10-2018
Location: BE
Views: 3,625
Message 3 of 9

Re: T480: Does not switch to secondary battery, turns off unexpectedly (Win10)

Thanks a ton for the detailed explanation. I implemented the solution earlier this week and yes, that seems to have solved the issue. Kudos to you!

JimBobMC
802.11n
Posts: 264
Registered: ‎10-27-2016
Location: US
Views: 3,604
Message 4 of 9

Re: T480: Does not switch to secondary battery, turns off unexpectedly (Win10)

 

weird issue ...

glad this fixed it ....

the dual battery system does not work the way that it should..................

If a post answers your question, please mark it as an ”Accepted Solution“!
If a post helps you, please click the star to give it a Kudo
~~
Some years back I worked for IBM, currently I do not work for,
nor do I speak for Lenovo or IBM.
mzak147
What's DOS?
Posts: 1
Registered: ‎06-05-2019
Location: US
Views: 3,252
Message 5 of 9

Re: T480: Does not switch to secondary battery, turns off unexpectedly (Win10)

I just tried this and it does show (2) batteries in the windows section, previously I only saw the one and when my main battery died I had to start up manually for the second battery to run.

 

Hopefully this fixes it.

 

Thanks a million for the suggestion and good detail, it's a great feature to have - if it works.

Nodir
What's DOS?
Posts: 1
Registered: ‎10-26-2019
Location: UZ
Views: 1,252
Message 6 of 9

Re: T480: Does not switch to secondary battery, turns off unexpectedly (Win10)

Thank you so much for your detailed explanation!!! It really helped. i was so dissappointed with a brand new t480 which i dreamt about for so long. Your help solved the situation so quickly!!!

MiquelDespuig
Paper Tape
Posts: 1
Registered: ‎10-30-2019
Location: ES
Views: 1,121
Message 7 of 9

Re: T480: Does not switch to secondary battery, turns off unexpectedly (Win10)

Hello Everyone,

 

I've tried several times the steps described and it didn't work for me Smiley Frustrated

 

I'm currently on Windows 10 1809 semi-annual channel. All firmware updated. All windows updates installed.

 

Is there any methods I can try to solve the problem?

 

Thanks a lot!!

Pieter_2
Paper Tape
Posts: 4
Registered: ‎09-10-2018
Location: BE
Views: 1,115
Message 8 of 9

Re: T480: Does not switch to secondary battery, turns off unexpectedly (Win10)

In my view it really is just a case of Windows 10 not properly handling two batteries well so these instructions are intended to get them both rediscovered by Windows one at a time. Be sure to follow the instructions to the letter.

Entity
Paper Tape
Posts: 1
Registered: ‎11-12-2019
Location: ME
Views: 741
Message 9 of 9

Re: T480: Does not switch to secondary battery, turns off unexpectedly (Win10)

I used this and after, it seams FIRST time my laptop used both batteries, since I worked on battery for hours which was not possible before(with same Power plan). Thank you.

But again, today I put my laptop on battery and after some time it went to sleep or turn off and than when I tried to turn it on I heard sound like battery is draining and it did not turn on. After I attached power to it, I turn it on and I see there is more than 40% of battery. So it seams like when I try to turn it on, it seas only one battery which is empty, but after i connect cable it wake up also another battery... I am really disappointed, no matter is this windows of lenovo issue..

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