Hello Thomas,

here`s how I did it, step by step.

1) install acpica-tools
apt-get install acpica-tools

2) Grab the DSDT of your device
cat /sys/firmware/acpi/tables/DSDT > dsdt.dat

3) Decompile the dsdt.dat
iasl -d dsdt.dsl

4) Open the dsdt.dsl with whatever editor tickles your fancy
e.g. xed dsdt.dsl

5) Delete everything with a * in front, first line should be
"DefinitionBlock"

6) Raise the last number in Definition Block by one
e.g.: 
DefinitionBlock ("", "DSDT", 2, "FUJ   ", "FJNBB6D ", 0x010C0000)
                                                               ↓
DefinitionBlock ("", "DSDT", 2, "FUJ   ", "FJNBB6D ", 0x010C0001)

7) Search for the string "OperationRegion (ERAM"
for me it was at line 18751; your mileage may vary

8) Replace the entire line with this one:
perationRegion (ERAM, EmbeddedControl, Zero, 0x0100)

9) Save and Exit

10) Recompile the dsdt.dsl (Note: This WILL show loads of errors and 
optimizations, I didn get to read into those yet)
This will give you a dsdt.aml that should work.

11) Proceed as above

Hope this one will work, have a good one :)

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You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/1956177

Title:
  battery not detected by ACPI

Status in linux package in Ubuntu:
  Confirmed

Bug description:
  On my freshly installed Fujitsu Lifebook A3510 now running kubuntu 21.10 with 
kernel 5.13.0-22-generic, there is an issue with the internal battery. When 
kernel boots up, ACPI isn't able to detect it correctly, see dmesg line:
  [    0.528105] ACPI: battery: Slot [BAT1] (battery absent)

  But asking lshw for power devices, it says:
  *-battery                 
         description: Lithium Ion Battery
         product: CP753347-01
         vendor: FUJITSU
         physical id: 1
         serial: 02A-Z201219003557Z
         slot: Internal Battery
         capacity: 45032mWh
         configuration: voltage=10,8V

  I've updated the BIOS to latest version 1.12 already, with no better result. 
What is the problem here, and how can I fix it?
  --- 
  ProblemType: Bug
  ApportVersion: 2.20.11-0ubuntu71
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  thomas      945 F.... pulseaudio
  CasperMD5CheckResult: pass
  CurrentDesktop: KDE
  DistroRelease: Ubuntu 21.10
  InstallationDate: Installed on 2021-12-31 (4 days ago)
  InstallationMedia: Kubuntu 21.10 "Impish Indri" - Release amd64 (20211012)
  MachineType: FUJITSU CLIENT COMPUTING LIMITED LIFEBOOK A3510
  Package: linux (not installed)
  ProcFB: 0 i915drmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.13.0-22-generic 
root=UUID=a67d854d-1ecf-4957-9b10-0204e42bbab0 ro quiet splash vt.handoff=7
  ProcVersionSignature: Ubuntu 5.13.0-22.22-generic 5.13.19
  RelatedPackageVersions:
   linux-restricted-modules-5.13.0-22-generic N/A
   linux-backports-modules-5.13.0-22-generic  N/A
   linux-firmware                             1.201.3
  Tags:  impish
  Uname: Linux 5.13.0-22-generic x86_64
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups: adm cdrom dip lpadmin lxd plugdev sambashare sudo
  _MarkForUpload: True
  dmi.bios.date: 09/22/2021
  dmi.bios.release: 1.12
  dmi.bios.vendor: FUJITSU CLIENT COMPUTING LIMITED
  dmi.bios.version: Version 1.12
  dmi.board.name: FJNBB6D
  dmi.board.vendor: FUJITSU CLIENT COMPUTING LIMITED
  dmi.board.version: EQAB073106
  dmi.chassis.type: 10
  dmi.chassis.vendor: FUJITSU CLIENT COMPUTING LIMITED
  dmi.ec.firmware.release: 1.9
  dmi.modalias: 
dmi:bvnFUJITSUCLIENTCOMPUTINGLIMITED:bvrVersion1.12:bd09/22/2021:br1.12:efr1.9:svnFUJITSUCLIENTCOMPUTINGLIMITED:pnLIFEBOOKA3510:pvr:rvnFUJITSUCLIENTCOMPUTINGLIMITED:rnFJNBB6D:rvrEQAB073106:cvnFUJITSUCLIENTCOMPUTINGLIMITED:ct10:cvr:skuSK00:
  dmi.product.family: LIFEBOOK-FTS
  dmi.product.name: LIFEBOOK A3510
  dmi.product.sku: SK00
  dmi.sys.vendor: FUJITSU CLIENT COMPUTING LIMITED

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