Did this issue start happening after an update/upgrade?  Was there a
prior kernel version where you were not having this particular problem?

Would it be possible for you to test the latest upstream kernel? Refer
to https://wiki.ubuntu.com/KernelMainlineBuilds . Please test the latest
v4.16 kernel[0].

If this bug is fixed in the mainline kernel, please add the following
tag 'kernel-fixed-upstream'.

If the mainline kernel does not fix this bug, please add the tag:

Once testing of the upstream kernel is complete, please mark this bug as

Thanks in advance.

[0] http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.16-rc1/

** Changed in: linux (Ubuntu)
   Importance: Undecided => Medium

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  Laptop turns of when secondary battery is empty while main battery is
  still charged.

Status in linux package in Ubuntu:

Bug description:
  I'm using a Lenovo T460s with two batteries running Ubuntu 17.10.

  The indicator shows the combined charge of both batteries and I was at
  40% when the laptop simply turned off. After the reboot I saw that the
  main battery was at 88% while the extra battery was at 0%. For some
  reason the OS deemed it necessary to perform an emergency shutdown
  without any warning.

  I don't know whether this is a problem in gnome power management or
  the kernel but please, please find a fix for this! Or provide some

  Best regards

  Christoph Grimmer-Dietrich

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